Product Index

1-BOC-3-PHENYL-3-HYDROXYPYRROLIDINE

Catalog No.: AA00GMSX

CAS No.:851000-71-0 MDL No.: MFCD11849822

MF: C15H21NO3 MW: 263.3321

Pricing and Availability

(3-aminophenyl)(imino)methyl-lambda6-sulfanone

Catalog No.: AA01DWMY

CAS No.:851008-24-7 MDL No.: MFCD30322480

MF: C7H10N2OS MW: 170.2321

Pricing and Availability

1-(Cyclopropylthio)-4-nitro-benzene

Catalog No.: AA00G9TO

CAS No.:851008-48-5 MDL No.: MFCD27929843

MF: C9H9NO2S MW: 195.2383

Pricing and Availability

ethyl [(4-aminophenyl)(methyl)oxido-lambda~4~-sulfanylidene]carbamate

Catalog No.: AA021CDF

CAS No.:851008-66-7 MDL No.: MFCD14282000

MF: C10H14N2O3S MW: 242.2948

Pricing and Availability

Catalog No.: AA021M96

CAS No.:851008-70-3 MDL No.:

MF: MW:

Pricing and Availability

H-GLU(OTBU)-LEU-OME HCL

Catalog No.: AA00G4BU

CAS No.:85101-25-3 MDL No.: MFCD00190910

MF: C16H31ClN2O5 MW: 366.8807

Pricing and Availability

N-(2-bromo-4-fluorophenyl)-2,2,2-trifluoroacetamide

Catalog No.: AA01AFE4

CAS No.:851010-92-9 MDL No.: MFCD12819942

MF: C8H4BrF4NO MW: 286.0211

Pricing and Availability

1-Benzyl-3-isopropylpiperazine

Catalog No.: AA004XH7

CAS No.:851014-13-6 MDL No.: MFCD12025408

MF: C14H22N2 MW: 218.3379

Pricing and Availability

5-Amino-2-butylbenzofuran-3-yl (4-(3-(dibutylamino)propoxy)phenyl) oxalate

Catalog No.: AA004RBY

CAS No.:851014-95-4 MDL No.: MFCD22371402

MF: C31H42N2O6 MW: 538.6750

Pricing and Availability

(S)-2-Amino-1-(4-hydroxypiperidin-1-yl)propan-1-one hydrochloride

Catalog No.: AA024UOI

CAS No.:851016-12-1 MDL No.:

MF: MW:

Pricing and Availability

N-(2H-1,3-benzodioxol-5-yl)quinazolin-4-amine

Catalog No.: AA01Z2ZA

CAS No.:851017-59-9 MDL No.:

MF: C15H11N3O2 MW: 265.2667

Pricing and Availability

2,3-Diphenylimidazo[1,2-a]pyridine

Catalog No.: AA00IDGK

CAS No.:85102-26-7 MDL No.: MFCD00772532

MF: C19H14N2 MW: 270.3279

Pricing and Availability

7-Phenylimidazo[1,2-a]pyridine

Catalog No.: AA00GKOU

CAS No.:85102-27-8 MDL No.: MFCD09994636

MF: C13H10N2 MW: 194.2319

Pricing and Availability

4-{[1-(prop-2-yn-1-yl)-1H-imidazol-2-yl]methyl}morpholine

Catalog No.: AA01BBRY

CAS No.:85102-38-1 MDL No.: MFCD21339238

MF: C11H15N3O MW: 205.2563

Pricing and Availability

Catalog No.: AA023RJO

CAS No.:85102-61-0 MDL No.:

MF: MW:

Pricing and Availability

1-Benzyl-1H-imidazole-4-carbaldehyde

Catalog No.: AA004OGB

CAS No.:85102-93-8 MDL No.: MFCD09033076

MF: C11H10N2O MW: 186.2099

Pricing and Availability

1-Benzyl-1H-imidazole-5-carboxaldehyde

Catalog No.: AA0036AG

CAS No.:85102-99-4 MDL No.: MFCD02179539

MF: C11H10N2O MW: 186.2099

Pricing and Availability

(S)-tert-Butyl2-formyl-2-methylpyrrolidine-1-carboxylate

Catalog No.: AA01V5EE

CAS No.:851028-60-9 MDL No.: MFCD27987060

MF: C11H19NO3 MW: 213.2735

Pricing and Availability

tert-Butyl (2S)-4,4-difluoro-2-[methoxy(methyl)carbamoyl]pyrrolidine-1-carboxylate

Catalog No.: AA020HOS

CAS No.:851029-02-2 MDL No.: MFCD28403260

MF: C12H20F2N2O4 MW: 294.2950

Pricing and Availability

2-[(2S)-1-[(tert-butoxy)carbonyl]pyrrolidin-2-yl]-2-hydroxyacetic acid

Catalog No.: AA027WY0

CAS No.:851029-13-5 MDL No.:

MF: C11H19NO5 MW: 245.2723

Pricing and Availability

5-(p-Tolyl)-1,3,4-thiadiazole-2(3H)-thione

Catalog No.: AA004XH2

CAS No.:85103-31-7 MDL No.: MFCD02667855

MF: C9H8N2S2 MW: 208.3032

Pricing and Availability

2-({[(4-methoxyphenyl)methylidene]amino}oxy)acetic acid

Catalog No.: AA021883

CAS No.:85103-47-5 MDL No.: MFCD02600672

MF: MW:

Pricing and Availability

2,4-Bis(benzyloxy)-6-chloro-1,3,5-triazine

Catalog No.: AA004OGA

CAS No.:851030-18-7 MDL No.: MFCD29089341

MF: C17H14ClN3O2 MW: 327.7650

Pricing and Availability

Catalog No.: AA01FYBY

CAS No.:851039-09-3 MDL No.:

MF: MW:

Pricing and Availability

Catalog No.: AA01FYBX

CAS No.:851039-10-6 MDL No.:

MF: MW:

Pricing and Availability

Catalog No.: AA01FYBZ

CAS No.:851039-19-5 MDL No.:

MF: MW:

Pricing and Availability

3-(4-Octylphenethyl)-fingolimod

Catalog No.: AA01E5DS

CAS No.:851039-24-2 MDL No.:

MF: C35H57NO2 MW: 523.8326

Pricing and Availability

2-(4-Octylphenethyl)-fingolimod

Catalog No.: AA01E5DT

CAS No.:851039-25-3 MDL No.:

MF: C35H57NO2 MW: 523.8326

Pricing and Availability

2,7-Diamino-9,9-di-n-octylfluorene

Catalog No.: AA00G9IA

CAS No.:851042-10-9 MDL No.: MFCD27923070

MF: C29H44N2 MW: 420.6731

Pricing and Availability

8-Bromo-3,4-dihydro-1H-benzo[b]azepin-5(2H)-one

Catalog No.: AA00GLUF

CAS No.:851045-03-9 MDL No.: MFCD11977262

MF: C10H10BrNO MW: 240.0965

Pricing and Availability

methyl 6-amino-2,3-dihydro-1H-indene-5-carboxylate

Catalog No.: AA00G8Z9

CAS No.:851045-26-6 MDL No.: MFCD20693759

MF: C11H13NO2 MW: 191.2264

Pricing and Availability

methyl 2-amino-4-bromo-3-methylbenzoate

Catalog No.: AA019SP3

CAS No.:851045-38-0 MDL No.: MFCD17244231

MF: C9H10BrNO2 MW: 244.0852

Pricing and Availability

2-amino-3-methyl-4-(trifluoromethyl)benzoic acid

Catalog No.: AA01BJ05

CAS No.:851045-51-7 MDL No.: MFCD23975412

MF: C9H8F3NO2 MW: 219.1605

Pricing and Availability

7-(Trifluoromethyl)-3,4-dihydro-1H-benzo[b]azepin-5(2H)-one

Catalog No.: AA00GA4Q

CAS No.:851045-54-0 MDL No.: MFCD07374496

MF: C11H10F3NO MW: 229.1984

Pricing and Availability

4-Iodo-3-(trifluoromethoxy)aniline

Catalog No.: AA01EE18

CAS No.:851045-63-1 MDL No.: MFCD27929847

MF: C7H5F3INO MW: 303.0204

Pricing and Availability

Benzenamine, 4-methyl-3-(trifluoromethoxy)-

Catalog No.: AA01R2DY

CAS No.:851045-64-2 MDL No.:

MF: C8H8F3NO MW: 191.1504

Pricing and Availability

Benzoic acid, 2-amino-5-bromo-4-(trifluoromethyl)-, methyl ester

Catalog No.: AA01Q1LC

CAS No.:851045-83-5 MDL No.:

MF: C9H7BrF3NO2 MW: 298.0566

Pricing and Availability

1-Amino-4-iodonaphthalene

Catalog No.: AA01X95N

CAS No.:851046-05-4 MDL No.: MFCD09031106

MF: C10H8IN MW: 269.0817

Pricing and Availability

2-(tert-Butoxycarbonylamino)-3-(2,6-difluorophenyl)propanoic acid

Catalog No.: AA004OG9

CAS No.:851047-82-0 MDL No.: MFCD17170968

MF: C14H17F2NO4 MW: 301.2859

Pricing and Availability

1-isopropyl-1,4-diazepane dihydrochloride

Catalog No.: AA00J36Q

CAS No.:851048-47-0 MDL No.: MFCD11841233

MF: C8H20Cl2N2 MW: 215.1638

Pricing and Availability

Tert-butyl 4-cyclobutyl-1,4-diazepane-1-carboxylate

Catalog No.: AA021DOX

CAS No.:851048-48-1 MDL No.:

MF: C14H26N2O2 MW: 254.3684

Pricing and Availability

1-Cyclobutyl-[1,4]diazepanedihydrochloride

Catalog No.: AA00GOB0

CAS No.:851048-49-2 MDL No.: MFCD09863256

MF: C9H20Cl2N2 MW: 227.1745

Pricing and Availability

4-((Tetrahydro-2H-pyran-4-yl)oxy)benzoic acid

Catalog No.: AA004XGZ

CAS No.:851048-51-6 MDL No.: MFCD09025874

MF: C12H14O4 MW: 222.2372

Pricing and Availability

4-(5-CYANO(PYRIDIN-3-YL))BENZOIC ACID

Catalog No.: AA004XGY

CAS No.:851048-54-9 MDL No.: MFCD16877952

MF: C13H8N2O2 MW: 224.2148

Pricing and Availability

4-(3-Methyl-1,2,4-oxadiazol-5-yl)benzoic acid

Catalog No.: AA004RBQ

CAS No.:851048-56-1 MDL No.: MFCD08741427

MF: C10H8N2O3 MW: 204.1821

Pricing and Availability

1-Cyclobutyl-[1,4]diazepane

Catalog No.: AA018N23

CAS No.:851049-21-3 MDL No.: MFCD09264175

MF: C9H18N2 MW: 154.2526

Pricing and Availability

4-iodo-3-methyl-1,2-thiazol-5-amine

Catalog No.: AA00GLUG

CAS No.:851049-22-4 MDL No.: MFCD20257781

MF: C4H5IN2S MW: 240.0654

Pricing and Availability

4-Ethynyl-3-methyl-1,2-thiazol-5-amine

Catalog No.: AA01AG13

CAS No.:851049-24-6 MDL No.: MFCD19207825

MF: C6H6N2S MW: 138.1902

Pricing and Availability

Tetrahydro-1H-thieno[3,4-d]imidazol-2(3H)-one 5,5-dioxide

Catalog No.: AA01ZVWA

CAS No.:85105-74-4 MDL No.:

MF: C5H8N2O3S MW: 176.1936

Pricing and Availability

(R)-GNA-T phosphoramidite

Catalog No.: AA021QMJ

CAS No.:851050-23-2 MDL No.:

MF: MW:

Pricing and Availability

(S)-GNA-A(Bz)-phosphoramidite

Catalog No.: AA021QJW

CAS No.:851050-24-3 MDL No.:

MF: MW:

Pricing and Availability

Benzenesulfonamide, N-[(1R,2R)-2-[[3-(1,4-cyclohexadien-1-yl)propyl]amino]-1,2-diphenylethyl]-4-methyl-

Catalog No.: AA00G3PJ

CAS No.:851051-41-7 MDL No.: MFCD30491831

MF: C30H34N2O2S MW: 486.6682

Pricing and Availability

{N-[3-(η6-phenyl)propyl]-[(1S-2S)-1,2-diphenyl-1-4-methylbenzenesulfonylamidato(kN)-ethyl-2-amino-(kN)]}ruthenium(II)

Catalog No.: AA00G4YV

CAS No.:851051-43-9 MDL No.: MFCD16294984

MF: C30H31ClN2O2RuS MW: 620.1673

Pricing and Availability

1-(1-Phenyl-3-p-tolyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M1B

CAS No.:851052-50-1 MDL No.:

MF: MW:

Pricing and Availability

1-(3-(4-chlorophenyl)-1-phenyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M1Z

CAS No.:851052-51-2 MDL No.:

MF: MW:

Pricing and Availability

1-(3-(4-Bromophenyl)-1-phenyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M0Z

CAS No.:851052-52-3 MDL No.:

MF: MW:

Pricing and Availability

1-(3-(4-Fluorophenyl)-1-phenyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M19

CAS No.:851052-53-4 MDL No.:

MF: MW:

Pricing and Availability

1-(1-(4-Chlorophenyl)-3-p-tolyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023LZE

CAS No.:851052-54-5 MDL No.:

MF: MW:

Pricing and Availability

1-(1,3-bis(4-Chlorophenyl)-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M1L

CAS No.:851052-55-6 MDL No.:

MF: MW:

Pricing and Availability

1-(3-(4-Bromophenyl)-1-(4-chlorophenyl)-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M2B

CAS No.:851052-56-7 MDL No.:

MF: MW:

Pricing and Availability

1-(1-(2,4-Difluorophenyl)-3-p-tolyl-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023LZ7

CAS No.:851052-57-8 MDL No.:

MF: MW:

Pricing and Availability

1-(3-(4-Bromophenyl)-1-(2,4-difluorophenyl)-1H-pyrazol-5-yl)thiourea

Catalog No.: AA023M0M

CAS No.:851052-60-3 MDL No.:

MF: MW:

Pricing and Availability

(3,5-Difluorophenyl)(pyrrolidin-1-yl)methanone

Catalog No.: AA022JE8

CAS No.:851053-31-1 MDL No.: MFCD20538598

MF: MW:

Pricing and Availability

Catalog No.: AA024AN6

CAS No.:851053-64-0 MDL No.:

MF: MW:

Pricing and Availability

3-(4-methylphenyl)-6-phenyl-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazine

Catalog No.: AA029FZ3

CAS No.:85106-36-1 MDL No.:

MF: C17H14N4S MW: 306.3849

Pricing and Availability

4-[6-(4-chlorophenyl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-3-yl]pyridine

Catalog No.: AA00IVYJ

CAS No.:85106-54-3 MDL No.: MFCD02187282

MF: C15H10ClN5S MW: 327.7914

Pricing and Availability

4-Amino-5-(4-bromophenyl)-4h-1,2,4-triazole-3-thiol

Catalog No.: AA01A0H4

CAS No.:85106-58-7 MDL No.: MFCD00806254

MF: C8H7BrN4S MW: 271.1370

Pricing and Availability

6-broMo-8-cyclopentyl-5-Methyl-2-(5-(piperazin-1-yl)pyridin-2-ylaMino)pyrido[2,3-d]pyriMidin-7(8H)-one

Catalog No.: AA00G9OT

CAS No.:851067-56-6 MDL No.: MFCD18207101

MF: C22H26BrN7O MW: 484.3921

Pricing and Availability

3-(4-Ethoxy-3-methoxyphenyl)prop-2-en-1-ol

Catalog No.: AA028VEJ

CAS No.:851069-07-3 MDL No.: MFCD21852771

MF: C12H16O3 MW: 208.2536

Pricing and Availability

(6-(4-(Trifluoromethoxy)phenyl)pyridin-3-yl)methanol

Catalog No.: AA004XGV

CAS No.:851069-96-0 MDL No.: MFCD06410451

MF: C13H10F3NO2 MW: 269.2192

Pricing and Availability

2-(4-(Trifluoromethoxy)phenyl)pyridine-5-carboxaldehyde

Catalog No.: AA004OG7

CAS No.:851069-97-1 MDL No.: MFCD04115436

MF: C13H8F3NO2 MW: 267.2033

Pricing and Availability

2-(4-Nitrophenyl)-1,3,2-dioxaborinane

Catalog No.: AA01XD4Y

CAS No.:85107-43-3 MDL No.: MFCD34476222

MF: C9H10BNO4 MW: 206.9910

Pricing and Availability

2-(3-Nitrophenyl)-1,3,2-dioxaborinane

Catalog No.: AA01XC0X

CAS No.:85107-44-4 MDL No.:

MF: C9H10BNO4 MW: 206.9910

Pricing and Availability

3-Hydroxypropyl hydrogen (2-nitrophenyl)boronate

Catalog No.: AA0221U9

CAS No.:85107-45-5 MDL No.:

MF: C9H12BNO5 MW: 225.0063

Pricing and Availability

4-BORONOANTHRANILIC ACID

Catalog No.: AA004RBM

CAS No.:85107-51-3 MDL No.: MFCD01675106

MF: C7H8BNO4 MW: 180.9537

Pricing and Availability

(3-Amino-4-(methoxycarbonyl)phenyl)boronic acid

Catalog No.: AA00IDGN

CAS No.:85107-52-4 MDL No.: MFCD02179468

MF: C8H10BNO4 MW: 194.9803

Pricing and Availability

2-(N,N-Dimethylaminomethyl)phenylboronic acid

Catalog No.: AA004XGT

CAS No.:85107-53-5 MDL No.: MFCD01318999

MF: C9H14BNO2 MW: 179.0240

Pricing and Availability

4-Carboxy-2-nitrophenylboronic acid

Catalog No.: AA004XGS

CAS No.:85107-54-6 MDL No.: MFCD00448780

MF: C7H6BNO6 MW: 210.9366

Pricing and Availability

4-Methoxycarbonyl-2-nitrophenylboronic acid

Catalog No.: AA008GGG

CAS No.:85107-55-7 MDL No.: MFCD01632202

MF: C8H8BNO6 MW: 224.9632

Pricing and Availability

4-Methoxycarbonyl-3-nitrophenylboronic acid

Catalog No.: AA008GGF

CAS No.:85107-56-8 MDL No.: MFCD12032027

MF: C8H8BNO6 MW: 224.9632

Pricing and Availability

6-TRIFLUOROMETHYL-NICOTINIC ACID ETHYL ESTER

Catalog No.: AA00G23Q

CAS No.:851070-23-0 MDL No.: MFCD04972865

MF: C9H8F3NO2 MW: 219.1605

Pricing and Availability

tert-butyl N-[(2E)-4-oxopent-2-en-1-yl]carbamate

Catalog No.: AA027VFV

CAS No.:851070-66-1 MDL No.: MFCD30163899

MF: C10H17NO3 MW: 199.2469

Pricing and Availability

N-Benzyl-2-bromo-N-phenylbutanamide

Catalog No.: AA003SOB

CAS No.:851073-30-8 MDL No.: MFCD11656095

MF: C17H18BrNO MW: 332.2349

Pricing and Availability

tetracosanoic-24,24,24-d<sub>3</sub> acid

Catalog No.: AA01LIXP

CAS No.:851073-55-7 MDL No.:

MF: C24H45D3O2 MW: 371.6552

Pricing and Availability

O-Acetyl-n-tert-butylhydroxylamine HCl

Catalog No.: AA003TCR

CAS No.:851074-40-3 MDL No.: MFCD12545957

MF: C6H14ClNO2 MW: 167.6339

Pricing and Availability

Methyl 2-amino-1,3-benzoxazole-6-carboxylate

Catalog No.: AA00GA4S

CAS No.:851075-63-3 MDL No.: MFCD18917418

MF: C9H8N2O3 MW: 192.1714

Pricing and Availability

4-(benzyloxy)naphthalene-2-carbaldehyde

Catalog No.: AA01A348

CAS No.:851077-04-8 MDL No.: MFCD18378314

MF: C18H14O2 MW: 262.3026

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,3-dimethylphenyl)acetamide

Catalog No.: AA01UJVI

CAS No.:851078-89-2 MDL No.:

MF: C19H18ClN3OS MW: 371.8837

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,5-dimethylphenyl)acetamide

Catalog No.: AA01UJEO

CAS No.:851078-90-5 MDL No.:

MF: C19H18ClN3OS MW: 371.8837

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,4-dimethylphenyl)acetamide

Catalog No.: AA01UKU2

CAS No.:851078-91-6 MDL No.:

MF: C19H18ClN3OS MW: 371.8837

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(3,5-dimethylphenyl)acetamide

Catalog No.: AA01NQHT

CAS No.:851078-92-7 MDL No.:

MF: C19H18ClN3OS MW: 371.8837

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,4-dimethoxyphenyl)acetamide

Catalog No.: AA01VJXD

CAS No.:851078-93-8 MDL No.:

MF: C19H18ClN3O3S MW: 403.8825

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-cyclohexylacetamide

Catalog No.: AA022DDM

CAS No.:851078-94-9 MDL No.:

MF: C17H20ClN3OS MW: 349.8782

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,3-dihydro-1,4-benzodioxin-6-yl)acetamide

Catalog No.: AA01NTEI

CAS No.:851078-95-0 MDL No.:

MF: C19H16ClN3O3S MW: 401.8666

Pricing and Availability

N-(2H-1,3-benzodioxol-5-yl)-2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}acetamide

Catalog No.: AA01ME5J

CAS No.:851078-96-1 MDL No.:

MF: C18H14ClN3O3S MW: 387.8401

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(2,4-difluorophenyl)acetamide

Catalog No.: AA01NQIT

CAS No.:851078-97-2 MDL No.:

MF: C17H12ClF2N3OS MW: 379.8115

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-[4-(trifluoromethoxy)phenyl]acetamide

Catalog No.: AA01N9MZ

CAS No.:851078-98-3 MDL No.:

MF: C18H13ClF3N3O2S MW: 427.8279

Pricing and Availability

N-(1,3-benzothiazol-2-yl)-2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}acetamide

Catalog No.: AA01N0NM

CAS No.:851078-99-4 MDL No.:

MF: C18H13ClN4OS2 MW: 400.9050

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(6-methyl-1,3-benzothiazol-2-yl)acetamide

Catalog No.: AA01MZTS

CAS No.:851079-00-0 MDL No.:

MF: C19H15ClN4OS2 MW: 414.9316

Pricing and Availability

2-{[1-(3-chlorophenyl)-1H-imidazol-2-yl]sulfanyl}-N-(1,3-thiazol-2-yl)acetamide

Catalog No.: AA022WQH

CAS No.:851079-01-1 MDL No.:

MF: C14H11ClN4OS2 MW: 350.8463

Pricing and Availability