Product Index

3-Oxo-1-oxa-7-aza-spiro[4.5]decane-7-carboxylic acid tert-butyl ester

Catalog No.: AA000BBL

CAS No.:1160246-89-8 MDL No.: MFCD12198527

MF: C13H21NO4 MW: 255.3101

Pricing and Availability

8-(tert-Butoxycarbonyl)-2-oxa-8-azaspiro[4.5]decane-3-carboxylic acid

Catalog No.: AA000BBM

CAS No.:1160246-86-5 MDL No.: MFCD12198524

MF: C14H22NO5- MW: 284.3282

Pricing and Availability

1H-Indole-2,3-dione, 1-[(4-methoxyphenyl)methyl]-5-(trifluoromethoxy)-

Catalog No.: AA000BCB

CAS No.:1160247-92-6 MDL No.: MFCD16618396

MF: C17H12F3NO4 MW: 351.2767

Pricing and Availability

8-(tert-Butoxycarbonyl)-8-azaspiro[4.5]decane-2-carboxylic acid

Catalog No.: AA000BCI

CAS No.:1160247-17-5 MDL No.: MFCD12198557

MF: C15H24NO4- MW: 282.3554

Pricing and Availability

3-([(4-Bromophenyl)sulfonyl]amino)propanoic acid

Catalog No.: AA000BDC

CAS No.:116035-58-6 MDL No.: MFCD00448265

MF: C9H10BrNO4S MW: 308.1490

Pricing and Availability

6-Iodo-2h-3,1-benzoxazine-2,4(1h)-dione

Catalog No.: AA000BDH

CAS No.:116027-10-2 MDL No.: MFCD06661932

MF: C8H4INO3 MW: 289.0267

Pricing and Availability

Benzenemethanol, 2,5-difluoro-4-nitro-

Catalog No.: AA000BE9

CAS No.:1160474-68-9 MDL No.: MFCD09909606

MF: C7H5F2NO3 MW: 189.1163

Pricing and Availability

2-Acetamido-5-bromothiophene-3-carboxylic acid

Catalog No.: AA000BEA

CAS No.:1160474-66-7 MDL No.: MFCD12025910

MF: C7H6BrNO3S MW: 264.0964

Pricing and Availability

D-Glucopyranose, 2-(acetylamino)-2,4-dideoxy-4-fluoro-, 1,3,6-triacetate

Catalog No.: AA000BEN

CAS No.:116049-57-1 MDL No.: MFCD04116084

MF: C14H20FNO8 MW: 349.3089

Pricing and Availability

Ethyl 4-amino-3-bromo-5-fluorobenzoate

Catalog No.: AA000BFR

CAS No.:1160574-67-3 MDL No.: MFCD11846088

MF: C9H9BrFNO2 MW: 262.0757

Pricing and Availability

3-Amino-2,2-dimethyl-3-oxopropanoic acid

Catalog No.: AA000BHL

CAS No.:116070-49-6 MDL No.: MFCD07783819

MF: C5H9NO3 MW: 131.1299

Pricing and Availability

1-Methyl-2-oxo-1,2-dihydropyridin-4-ylboronic acid pinacol ester

Catalog No.: AA000BHX

CAS No.:1160790-84-0 MDL No.: MFCD12032569

MF: C12H18BNO3 MW: 235.0872

Pricing and Availability

3-Bromoquinolin-7-ol

Catalog No.: AA000BJ1

CAS No.:1160949-99-4 MDL No.: MFCD18413578

MF: C9H6BrNO MW: 224.0540

Pricing and Availability

5-Acetonyl-2-methoxybenzene sulfonamide

Catalog No.: AA000BJL

CAS No.:116091-63-5 MDL No.: MFCD07782136

MF: C10H13NO4S MW: 243.2795

Pricing and Availability

1-(5-Bromo-3-fluoropyridin-2-yl)ethanone

Catalog No.: AA000BJ2

CAS No.:1160936-52-6 MDL No.: MFCD13689180

MF: C7H5BrFNO MW: 218.0231

Pricing and Availability

2-Chloro-6-methoxy-4-(trifluoromethyl)pyridine

Catalog No.: AA000BJX

CAS No.:1160994-99-9 MDL No.: MFCD11845745

MF: C7H5ClF3NO MW: 211.5689

Pricing and Availability

2-Fluoro-5-methylpyridine-3-carbaldehyde

Catalog No.: AA000BK6

CAS No.:1160993-95-2 MDL No.: MFCD12025467

MF: C7H6FNO MW: 139.1270

Pricing and Availability

3H-Cyclopenta[c]quinoline, 4-(6-bromo-1,3-benzodioxol-5-yl)-3a,4,5,9b-tetrahydro-, (3aS,4R,9bR)-

Catalog No.: AA000BKL

CAS No.:1161002-05-6 MDL No.: MFCD16618401

MF: C19H16BrNO2 MW: 370.2398

Pricing and Availability

4,5,6,7-Tetrahydrothieno[3,2-c]pyridine-2-carboxylic acid hydrochloride

Catalog No.: AA000BMF

CAS No.:116118-99-1 MDL No.: MFCD20489124

MF: C8H10ClNO2S MW: 219.6885

Pricing and Availability

4,5,6,7-Tetrahydrothieno[3,2-c]pyridine-2-carboxylic acid

Catalog No.: AA000BL3

CAS No.:116118-98-0 MDL No.: MFCD08696382

MF: C8H9NO2S MW: 183.2276

Pricing and Availability

tert-Butyl 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2H-benzo[b][1,4]oxazine-4(3H)-carboxylate

Catalog No.: AA000BMH

CAS No.:1161362-35-1 MDL No.: MFCD11044677

MF: C19H28BNO5 MW: 361.2403

Pricing and Availability

2-Azabicyclo[2.1.1]hexane-1-carboxylic acid hydrochloride

Catalog No.: AA000BMZ

CAS No.:116129-07-8 MDL No.: MFCD08460278

MF: C6H10ClNO2 MW: 163.6021

Pricing and Availability

1,2,3,4-Tetrahydroisoquinoline-4-carboxylic acid

Catalog No.: AA000BNG

CAS No.:116140-19-3 MDL No.: MFCD08236715

MF: C10H11NO2 MW: 177.1998

Pricing and Availability

1-(Phenoxycarbonyl)pyrrolidine-2-carboxylic acid

Catalog No.: AA000BOJ

CAS No.:1161602-22-7 MDL No.: MFCD01045469

MF: C12H12NO4- MW: 234.2280

Pricing and Availability

3-Methylpiperidine-3-carboxylic acid

Catalog No.: AA000BND

CAS No.:116140-49-9 MDL No.: MFCD12024776

MF: C7H13NO2 MW: 143.1836

Pricing and Availability

3-Methylpiperidine-3-carboxylic acid hydrochloride

Catalog No.: AA000BNF

CAS No.:116140-22-8 MDL No.: MFCD20441739

MF: C7H14ClNO2 MW: 179.6446

Pricing and Availability

2-Thiophenecarboxylic acid, 4-cyano-5-(methylthio)-, ethyl ester

Catalog No.: AA000BQ5

CAS No.:116170-84-4 MDL No.: MFCD01859680

MF: C9H9NO2S2 MW: 227.3033

Pricing and Availability

2-Thiophenecarboxylic acid, 4-cyano-5-(methylthio)-

Catalog No.: AA000BQ4

CAS No.:116170-85-5 MDL No.: MFCD12026743

MF: C7H5NO2S2 MW: 199.2501

Pricing and Availability

Boc-dl-ile-oh

Catalog No.: AA000BSH

CAS No.:116194-21-9 MDL No.: MFCD00237550

MF: C11H21NO4 MW: 231.2887

Pricing and Availability

2-Propanol, 1-[4-[2-(cyclopropylmethoxy)ethyl]phenoxy]-3-[(1-methylethyl)amino]-, hydrochloride (1:1), (2S)-

Catalog No.: AA000BV6

CAS No.:116209-55-3 MDL No.: MFCD08067730

MF: C18H30ClNO3 MW: 343.8887

Pricing and Availability

3-Methoxy-4-(pyrrolidin-1-yl)benzaldehyde

Catalog No.: AA000BVA

CAS No.:116209-27-9 MDL No.: MFCD07403409

MF: C12H15NO2 MW: 205.2530

Pricing and Availability

6-(Trifluoromethyl)pyridine-2-boronic acid

Catalog No.: AA000BW9

CAS No.:1162257-61-5 MDL No.: MFCD08061586

MF: C6H5BF3NO2 MW: 190.9156

Pricing and Availability

5-(Trifluoromethyl)pyridine-2-boronic acid

Catalog No.: AA000BWA

CAS No.:1162257-58-0 MDL No.: MFCD06227445

MF: C6H5BF3NO2 MW: 190.9156

Pricing and Availability

2-Fluoro-6-methoxypyridine

Catalog No.: AA000BXL

CAS No.:116241-61-3 MDL No.: MFCD09998161

MF: C6H6FNO MW: 127.1163

Pricing and Availability

2-Ethoxy-5-methylpyridine-3-boronic acid

Catalog No.: AA000BWE

CAS No.:1162256-87-2 MDL No.: MFCD18382896

MF: C8H12BNO3 MW: 180.9968

Pricing and Availability

Ethyl 6-fluoronicotinate

Catalog No.: AA000BXM

CAS No.:116241-59-9 MDL No.: MFCD12756554

MF: C8H8FNO2 MW: 169.1530

Pricing and Availability

1-Propanamine, N-(1,3-dimethylbutylidene)-3-(triethoxysilyl)-

Catalog No.: AA000BXH

CAS No.:116229-43-7 MDL No.: MFCD08275342

MF: C15H33NO3Si MW: 303.5129

Pricing and Availability

1-(4-Fluorophenyl)piperidin-4-one

Catalog No.: AA000BYG

CAS No.:116247-98-4 MDL No.: MFCD05864502

MF: C11H12FNO MW: 193.2175

Pricing and Availability

Methyl 4-amino-3,5-difluorobenzoate

Catalog No.: AA000BZN

CAS No.:1162676-00-7 MDL No.: MFCD20725083

MF: C8H7F2NO2 MW: 187.1435

Pricing and Availability

6-Amino-2,3-dichlorophenol

Catalog No.: AA000C1I

CAS No.:116278-69-4 MDL No.: MFCD20693682

MF: C6H5Cl2NO MW: 178.0160

Pricing and Availability

6-Fluoroquinoline-3-carboxylic acid

Catalog No.: AA000C1R

CAS No.:116293-90-4 MDL No.: MFCD08437578

MF: C10H6FNO2 MW: 191.1585

Pricing and Availability

3-(m-Tolyloxy)aniline

Catalog No.: AA000C22

CAS No.:116289-59-9 MDL No.: MFCD06656960

MF: C13H13NO MW: 199.2484

Pricing and Availability

2-(Trifluoromethyl)nicotinaldehyde

Catalog No.: AA000C2C

CAS No.:116308-35-1 MDL No.: MFCD08234912

MF: C7H4F3NO MW: 175.1080

Pricing and Availability

Naphthol as acetate

Catalog No.: AA000C2V

CAS No.:1163-67-3 MDL No.: MFCD00004095

MF: C19H15NO3 MW: 305.3273

Pricing and Availability

3-(3,4-Dihydroxy-5-nitrobenzylidene)pentane-2,4-dione

Catalog No.: AA000C4B

CAS No.:116313-94-1 MDL No.: MFCD00866318

MF: C12H11NO6 MW: 265.2188

Pricing and Availability

Methyl 4-fluoro-2-methyl-5-nitrobenzoate

Catalog No.: AA000C4F

CAS No.:1163287-01-1 MDL No.: MFCD14581697

MF: C9H8FNO4 MW: 213.1625

Pricing and Availability

3,4-Dihydroxy-5-nitrobenzaldehyde

Catalog No.: AA000C4C

CAS No.:116313-85-0 MDL No.: MFCD00871897

MF: C7H5NO5 MW: 183.1183

Pricing and Availability

Benzoic acid, 3-cyano-5-hydroxy-

Catalog No.: AA000C3P

CAS No.:1163141-57-8 MDL No.: MFCD16999148

MF: C8H5NO3 MW: 163.1302

Pricing and Availability

1H-Indole, 2,3-dimethyl-1-(phenylsulfonyl)-

Catalog No.: AA000C4P

CAS No.:116325-48-5 MDL No.: MFCD08051489

MF: C16H15NO2S MW: 285.3608

Pricing and Availability

2-Chloro-4-fluorobenzo[d]oxazole

Catalog No.: AA000C33

CAS No.:1163123-39-4 MDL No.: MFCD16250626

MF: C7H3ClFNO MW: 171.5562

Pricing and Availability

N-Methoxy-n-methyl-3-(trifluoromethyl)benzamide

Catalog No.: AA000C5G

CAS No.:116332-62-8 MDL No.: MFCD08689665

MF: C10H10F3NO2 MW: 233.1871

Pricing and Availability

1H-Indole-3-carboxylic acid, 1-(phenylsulfonyl)-, methyl ester

Catalog No.: AA000C4R

CAS No.:116325-17-8 MDL No.: MFCD03305948

MF: C16H13NO4S MW: 315.3437

Pricing and Availability

N-Methoxy-n-methyl-4-(trifluoromethyl)benzamide

Catalog No.: AA000C5H

CAS No.:116332-61-7 MDL No.: MFCD08689795

MF: C10H10F3NO2 MW: 233.1871

Pricing and Availability

4-Fluoro-N-methoxy-N-methylbenzamide

Catalog No.: AA000C5I

CAS No.:116332-54-8 MDL No.: MFCD02179265

MF: C9H10FNO2 MW: 183.1796

Pricing and Availability

Methyl 6-hydroxy-1h-indole-2-carboxylate

Catalog No.: AA000C6Q

CAS No.:116350-38-0 MDL No.: MFCD11053690

MF: C10H9NO3 MW: 191.1834

Pricing and Availability

1,2,3-Propanetricarboxylic acid, 1,1'-[(1S,2R)-1-[(2S,4R,9R,11S,12S)-12-amino-4,9,11-trihydroxy-2-methyltridecyl]-2-[(1R)-1-methylpentyl]-1,2-ethanediyl] ester, (2R,2'R)-

Catalog No.: AA000C7L

CAS No.:116355-83-0 MDL No.: MFCD00133349

MF: C34H61NO16 MW: 739.8452

Pricing and Availability

4-Bromo-2-methylbenzenesulfonamide

Catalog No.: AA000C66

CAS No.:116340-67-1 MDL No.: MFCD08234785

MF: C7H8BrNO2S MW: 250.1129

Pricing and Availability

1,2,3-Propanetricarboxylic acid, 1,1'-[(1S,2R)-1-[(2S,9R,11S,12S)-12-amino-9,11-dihydroxy-2-methyltridecyl]-2-[(1R)-1-methylpentyl]-1,2-ethanediyl] ester, (2R,2'R)-

Catalog No.: AA000C7K

CAS No.:116355-84-1 MDL No.: MFCD00133350

MF: C34H59NO14 MW: 705.8306

Pricing and Availability

2-Chloro-3-iodo-4-methoxypyridine

Catalog No.: AA000C8S

CAS No.:1163693-01-3 MDL No.: MFCD18415710

MF: C6H5ClINO MW: 269.4675

Pricing and Availability

4-Bromo-3-(trifluoromethoxy)aniline

Catalog No.: AA000C97

CAS No.:116369-25-6 MDL No.: MFCD11506046

MF: C7H5BrF3NO MW: 256.0199

Pricing and Availability

Methyl 3-chloropicolinate

Catalog No.: AA000CAL

CAS No.:116383-98-3 MDL No.: MFCD09750958

MF: C7H6ClNO2 MW: 171.5810

Pricing and Availability

3-Amino-5-carboxylphenylboronic acid

Catalog No.: AA000C9O

CAS No.:116378-40-6 MDL No.: MFCD02179466

MF: C7H8BNO4 MW: 180.9537

Pricing and Availability

2-Hydroxy-5-iodo-nicotinic acid methyl ester

Catalog No.: AA000CA0

CAS No.:116387-40-7 MDL No.: MFCD06659597

MF: C7H6INO3 MW: 279.0319

Pricing and Availability

Z-Tyr-OH

Catalog No.: AA000CBZ

CAS No.:1164-16-5 MDL No.: MFCD00191899

MF: C17H17NO5 MW: 315.3206

Pricing and Availability

2-Cyano-6-methoxyphenylboronic acid

Catalog No.: AA000CC0

CAS No.:1164100-85-9 MDL No.: MFCD10696677

MF: C8H8BNO3 MW: 176.9650

Pricing and Availability

tert-Butyl (4-oxo-4-phenylbutyl)carbamate

Catalog No.: AA000CEW

CAS No.:116437-41-3 MDL No.: MFCD08060130

MF: C15H21NO3 MW: 263.3321

Pricing and Availability

3-(3,5-Dimethylisoxazol-4-yl)propanoic acid

Catalog No.: AA000CDM

CAS No.:116423-07-5 MDL No.: MFCD02628165

MF: C8H11NO3 MW: 169.1778

Pricing and Availability

2-Acetamido-4-bromotoluene

Catalog No.: AA000CF1

CAS No.:116436-10-3 MDL No.: MFCD11520466

MF: C9H10BrNO MW: 228.0858

Pricing and Availability

2-Amino-3-bromophenol

Catalog No.: AA000CF4

CAS No.:116435-77-9 MDL No.: MFCD08445676

MF: C6H6BrNO MW: 188.0219

Pricing and Availability

α-Neuraminic acid, N-acetyl-2-S-methyl-2-thio-, methyl ester, 4,7,8,9-tetraacetate

Catalog No.: AA000CFH

CAS No.:116450-06-7 MDL No.: MFCD00792864

MF: C21H31NO12S MW: 521.5353

Pricing and Availability

Ethyl 3-(4-cyanophenyl)propanoate

Catalog No.: AA000CGX

CAS No.:116460-89-0 MDL No.: MFCD08234822

MF: C12H13NO2 MW: 203.2371

Pricing and Availability

N-(4-Fluorobenzyl)-3-oxobutanamide

Catalog No.: AA000CHI

CAS No.:116475-94-6 MDL No.: MFCD00811434

MF: C11H12FNO2 MW: 209.2169

Pricing and Availability

2,5-Difluoro-4-nitrobenzoic acid

Catalog No.: AA000CI5

CAS No.:116465-48-6 MDL No.: MFCD03425705

MF: C7H3F2NO4 MW: 203.0998

Pricing and Availability

3,3-Bis(methylthio)-2-(3-(trifluoromethyl)benzoyl)acrylonitrile

Catalog No.: AA000CJX

CAS No.:116492-97-8 MDL No.: MFCD00174303

MF: C13H10F3NOS2 MW: 317.3498

Pricing and Availability

2,3-Dihydro-1h-pyrrolizine-7-carboxylic acid

Catalog No.: AA000CL2

CAS No.:116515-48-1 MDL No.: MFCD12924073

MF: C8H9NO2 MW: 151.1626

Pricing and Availability

5-Nitro-2-indanone

Catalog No.: AA000CMD

CAS No.:116530-60-0 MDL No.: MFCD00598938

MF: C9H7NO3 MW: 177.1568

Pricing and Availability

4-iodo-2-nitrobenzoic acid

Catalog No.: AA000CMQ

CAS No.:116529-62-5 MDL No.: MFCD09909618

MF: C7H4INO4 MW: 293.0154

Pricing and Availability

6-Methylquinolin-5-ol

Catalog No.: AA000CMN

CAS No.:116529-84-1 MDL No.: MFCD18414794

MF: C10H9NO MW: 159.1846

Pricing and Availability

3-Bromo-2-nitrobenzoic acid

Catalog No.: AA000CMR

CAS No.:116529-61-4 MDL No.: MFCD10700064

MF: C7H4BrNO4 MW: 246.0150

Pricing and Availability

4-Aminotetrahydro-2H-thiopyran 1,1-dioxide, HCl

Catalog No.: AA000CMV

CAS No.:116529-31-8 MDL No.: MFCD11114559

MF: C5H12ClNO2S MW: 185.6723

Pricing and Availability

methyl[(3S)-3-(naphthalen-1-yloxy)-3-(thiophen-2-yl)propyl]amine

Catalog No.: AA000CN4

CAS No.:116539-59-4 MDL No.: MFCD06801358

MF: C18H19NOS MW: 297.4146

Pricing and Availability

3-[(Dimethylamino)methyl]-4-hydroxybenzaldehyde

Catalog No.: AA000CNR

CAS No.:116546-04-4 MDL No.: MFCD07186317

MF: C10H13NO2 MW: 179.2157

Pricing and Availability

(S)-(-)-3-(N-Methylamino)-1-(2-thienyl)-1-propanol

Catalog No.: AA000CN7

CAS No.:116539-55-0 MDL No.: MFCD07357308

MF: C8H13NOS MW: 171.2599

Pricing and Availability

1-(2-Hydroxy-6-(trifluoromethyl)pyridin-3-yl)ethanone

Catalog No.: AA000COO

CAS No.:116548-05-1 MDL No.: MFCD09971732

MF: C8H6F3NO2 MW: 205.1339

Pricing and Availability

N-(2-Iodophenyl)methanesulfonamide

Catalog No.: AA000COT

CAS No.:116547-92-3 MDL No.: MFCD00978524

MF: C7H8INO2S MW: 297.1134

Pricing and Availability

6-Hydroxy-2,3-dihydro-1h-indole-2,3-dione

Catalog No.: AA000CP4

CAS No.:116569-08-5 MDL No.: MFCD08689914

MF: C8H5NO3 MW: 163.1302

Pricing and Availability

N-(2-Bromophenyl)methanesulfonamide

Catalog No.: AA000COU

CAS No.:116547-91-2 MDL No.: MFCD00585027

MF: C7H8BrNO2S MW: 250.1129

Pricing and Availability

2-(2-Azabicyclo[2.2.1]heptan-2-yl)ethanol

Catalog No.: AA000CQP

CAS No.:116585-72-9 MDL No.: MFCD08059740

MF: C8H15NO MW: 141.2108

Pricing and Availability

3-(Methoxymethyl)piperidine

Catalog No.: AA000CQ3

CAS No.:116574-72-2 MDL No.: MFCD06248040

MF: C7H15NO MW: 129.2001

Pricing and Availability

3-Bromo-2-methoxyaniline

Catalog No.: AA000CPG

CAS No.:116557-46-1 MDL No.: MFCD13186737

MF: C7H8BrNO MW: 202.0485

Pricing and Availability

5-Hydroxy-2,3-dihydro-1h-indole-2,3-dione

Catalog No.: AA000CQF

CAS No.:116569-09-6 MDL No.: MFCD11007925

MF: C8H5NO3 MW: 163.1302

Pricing and Availability

3-Bromo-5-nitrophenol

Catalog No.: AA000CUJ

CAS No.:116632-23-6 MDL No.: MFCD09965960

MF: C6H4BrNO3 MW: 218.0049

Pricing and Availability

3-(Aminomethyl)cyclohexanol

Catalog No.: AA000CUZ

CAS No.:116650-26-1 MDL No.: MFCD07786652

MF: C7H15NO MW: 129.2001

Pricing and Availability

2-Fluoro-4-(methylsulfonyl)nitrobenzene

Catalog No.: AA000CVY

CAS No.:1166756-97-3 MDL No.: MFCD12828682

MF: C7H6FNO4S MW: 219.1902

Pricing and Availability

2-Naphthalenecarboxylic acid, 6-amino-

Catalog No.: AA000CVI

CAS No.:116668-47-4 MDL No.: MFCD01861831

MF: C11H9NO2 MW: 187.1947

Pricing and Availability

Propanoic acid, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]-, methyl ester, (2S)-

Catalog No.: AA000CVU

CAS No.:116661-27-9 MDL No.: MFCD23703007

MF: C16H13ClF3NO4 MW: 375.7269

Pricing and Availability

6-Chloro-5-methylpyridine-2-carboxylic acid

Catalog No.: AA000CWS

CAS No.:1166828-13-2 MDL No.: MFCD13176716

MF: C7H6ClNO2 MW: 171.5810

Pricing and Availability

Fk 3311

Catalog No.: AA000CX4

CAS No.:116686-15-8 MDL No.: MFCD00876455

MF: C15H13F2NO4S MW: 341.3298

Pricing and Availability

2-Bromooxazole-4-carboxylic acid

Catalog No.: AA000CZ6

CAS No.:1167055-73-3 MDL No.: MFCD11845654

MF: C4H2BrNO3 MW: 191.9676

Pricing and Availability

6-Fluoroquinolin-3-ol

Catalog No.: AA000CZW

CAS No.:1167056-03-2 MDL No.: MFCD12405089

MF: C9H6FNO MW: 163.1484

Pricing and Availability