CAS number index

CAS numbers starting with 21, page 27

8,045 chemicals have a CAS number that starts with 21. They are listed in CAS order.

Showing 2,601 to 2,700 of 8,045 chemicals

CAS numberChemical nameFormulaMol. weight

213771-32-5Methyl 5-bromo-3-methylpicolinateC₈H₈BrNO₂230.06
2137710-89-32-(((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)methyl)-5-methyl-1,3-thiazole-4-carboxylic acidC₂₁H₁₈N₂O₄S394.45
2137714-28-25-(Fluorosulfonyl)thiophene-2-carboxylic acidC₅H₃FO₄S₂210.21
2137717-80-5rac-(1R,2R,4S)-2-(Aminomethyl)-4-(5H,6H,8H-(1,2,4)triazolo(3,4-c)(1,4)oxazin-3-yl)cyclopentan-1-olC₁₁H₁₈N₄O₂238.29
2137717-81-6tert-Butyl 3-(5-amino-1H-pyrazol-1-yl)azetidine-1-carboxylateC₁₁H₁₈N₄O₂238.29
2137718-17-1rac-Methyl (1R,2S)-2-[(chlorosulfonyl)methyl]cyclopropane-1-carboxylateC₆H₉ClO₄S212.65
2137718-44-43-Fluoro-5-formyl-4-methoxybenzoic acidC₉H₇FO₄198.15
2137718-90-0tert-Butyl 8-formyl-6-azaspiro[3.4]octane-6-carboxylateC₁₃H₂₁NO₃239.31
2137718-93-32-[3-({[(9H-Fluoren-9-yl)methoxy]carbonyl}amino)cyclobutyl]acetic acidC₂₁H₂₁NO₄351.40
2137719-36-76-tert-Butylpyridin-3-amine dihydrochlorideC₉H₁₆Cl₂N₂223.15
2137719-42-52-Methylmorpholine-2-carboxylic acid hydrochlorideC₆H₁₂ClNO₃181.62
2137719-74-36-(Methylamino)pyrimidine-4-carbonitrile hydrochlorideC₆H₇ClN₄170.60
2137719-85-6tert-Butyl 1-ethynyl-3-azabicyclo[3.2.0]heptane-3-carboxylateC₁₃H₁₉NO₂221.30
2137719-96-9[3-Amino-1-(hydroxymethyl)cyclobutyl]methanol hydrochlorideC₆H₁₄ClNO₂167.64
213772-01-14-[Benzyl(tert-butoxycarbonyl)amino]butanoic acidC₁₆H₂₃NO₄293.36
2137720-76-23,5-Dimethoxy-1,2-thiazole-4-carbaldehydeC₆H₇NO₃S173.19
2137720-89-75-Formylpyridine-3-carboxylic acid hydrochlorideC₇H₆ClNO₃187.58
2137722-12-22-(1-Methyl-1H-imidazol-2-yl)oxane-3-carbohydrazideC₁₀H₁₆N₄O₂224.26
2137722-22-44,4,4-Trifluoro-3-phenylbutane-1-sulfonyl chlorideC₁₀H₁₀ClF₃O₂S286.70
2137722-50-85-Bromo-1-methyl-1H-pyrrolo[2,3-b]pyridine-2-carboxylic acidC₉H₇BrN₂O₂255.07
2137722-78-0tert-Butyl 1-ethynyl-2-azabicyclo(2.1.1)hexane-2-carboxylateC₁₂H₁₇NO₂207.27
2137723-29-41-(Aminomethyl)-3-hydroxycyclobutane-1-carboxylic acid hydrochlorideC₆H₁₂ClNO₃181.62
2137725-59-6(2,3,4,5-Tetrahydro-1,4-benzoxazepin-5-yl)methanol hydrochlorideC₁₀H₁₄ClNO₂215.68
2137725-80-34-(((tert-Butoxy)carbonyl)amino)naphthalene-2-carboxylic acidC₁₆H₁₇NO₄287.31
2137728-03-9(3-Methoxycyclobutyl)methanesulfonyl chlorideC₆H₁₁ClO₃S198.67
2137728-08-44-((Benzyloxy)methyl)-1-(iodomethyl)-2-oxabicyclo(2.2.2)octaneC₁₆H₂₁IO₂372.25
2137729-12-31-Methylazepan-4-amine dihydrochlorideC₇H₁₈Cl₂N₂201.14
2137729-16-71-Cyclopropyl-3-(difluoromethyl)-1H-pyrazole-4-carboxylic acidC₈H₈F₂N₂O₂202.16
2137732-24-04-Chloro-6-methyl-5H,6H,7H-pyrrolo[3,4-b]pyridin-7-oneC₈H₇ClN₂O182.61
2137733-50-53-Amino-3-(3-iodophenyl)propanoic acid hydrochlorideC₉H₁₁ClINO₂327.55
2137734-29-12-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-8-methoxy-1,2,3,4-tetrahydroisoquinoline-5-carboxylic acidC₂₆H₂₃NO₅429.47
2137735-50-11-(4-Fluorophenyl)-N-methylethane-1-sulfonamideC₉H₁₂FNO₂S217.26
2137735-76-1(2,6-Diamino-9H-purin-8-yl)methanol dihydrochlorideC₆H₁₀Cl₂N₆O253.09
2137735-78-32-Chloro-1-[3-(2-chloroacetyl)-4-fluorophenyl]ethan-1-oneC₁₀H₇Cl₂FO₂249.07
2137737-20-14-Phenyl-1lambda6,2-thiazolidine-1,1,3-trioneC₉H₉NO₃S211.24
2137737-44-9tert-Butyl N-[2-(1,2,3,4-tetrahydroquinolin-3-yl)ethyl]carbamateC₁₆H₂₄N₂O₂276.38
2137738-16-8(5-Cyclopropyloxolan-2-yl)methanesulfonyl chlorideC₈H₁₃ClO₃S224.71
2137738-28-21-Butylcyclopropan-1-amine hydrochlorideC₇H₁₆ClN149.66
2137738-72-6rac-(1R,6S)-2-(((9H-Fluoren-9-yl)methoxy)carbonyl)-2-azabicyclo(4.1.0)heptane-1-carboxylic acidC₂₂H₂₁NO₄363.41
2137739-14-9Methyl 2-(oxolan-2-yl)piperidine-4-carboxylateC₁₁H₁₉NO₃213.28
213774-63-15-Bromopentane-1-sulfonyl chlorideC₅H₁₀BrClO₂S249.56
2137740-10-22-(Oxan-2-yl)pyrrolidine hydrochlorideC₉H₁₈ClNO191.70
2137742-29-91-Ethynyl-1-methylcyclobutaneC₇H₁₀94.16
2137742-39-13-Ethynyl-4-methyl-1H-pyrazoleC₆H₆N₂106.13
2137742-56-22-Amino-2-(3-bromophenyl)propan-1-ol hydrochlorideC₉H₁₃BrClNO266.57
2137742-96-0(Bicyclo(2.2.2)octan-1-yl)methanesulfonyl fluorideC₉H₁₅FO₂S206.28
2137744-08-05-Bromo-2-methylbenzene-1-sulfonyl fluorideC₇H₆BrFO₂S253.09
2137744-33-1(R)-N-(1-(7-(But-2-yn-1-yl)-3-methyl-1-((4-methylquinazolin-2-yl)methyl)-2,6-dioxo-2,3,6,7-tetrahydro-1H-purin-8-yl)piperidin-3-yl)formamideC₂₆H₂₈N₈O₃500.56
2137744-50-21,3-Dimethyl-2,4-dioxo-1,2,3,4-tetrahydroquinazoline-6-sulfonyl fluorideC₁₀H₉FN₂O₄S272.26
2137744-56-84-Chlorothieno[3,2-d]pyrimidine-6-sulfonyl fluorideC₆H₂ClFN₂O₂S₂252.68
2137745-06-15-(Difluoromethyl)-1-methyl-1H-1,2,3-triazol-4-amine hydrochlorideC₄H₇ClF₂N₄184.58
2137745-15-21-(2-Bromophenyl)-5-methyl-1H-pyrazol-3-amine hydrochlorideC₁₀H₁₁BrClN₃288.58
2137745-79-81-(2-Methylpropyl)-1H-imidazole-4-sulfonyl fluorideC₇H₁₁FN₂O₂S206.24
2137746-00-82-Oxo-2,4-dihydro-1H-3,1-benzoxazine-6-sulfonyl fluorideC₈H₆FNO₄S231.20
2137746-17-7tert-Butyl 7-((chlorosulfonyl)methyl)-6-oxa-2-azaspiro(3.4)octane-2-carboxylateC₁₂H₂₀ClNO₅S325.81
2137747-55-6Chloromethyl 3-{[(tert-butoxy)carbonyl]amino}oxetane-3-carboxylateC₁₀H₁₆ClNO₅265.69
2137748-24-2[1-(Cyanomethyl)cyclopropyl]methanesulfonyl fluorideC₆H₈FNO₂S177.20
2137749-25-61-((3-Oxocyclobutyl)methyl)-1H-1,2,3-triazole-4-carboxylic acidC₈H₉N₃O₃195.18
2137749-43-8Dimethyl({[(piperidin-4-yl)methyl]imino})-lambda6-sulfanone dihydrochlorideC₈H₂₀Cl₂N₂OS263.23
2137751-52-93-Chloro-5-(fluorosulfonyl)-4-hydroxybenzoic acidC₇H₄ClFO₅S254.62
2137753-50-35-(4-Carboxyphenyl)pyrimidine-2-carboxylic acidC₁₂H₈N₂O₄244.21
2137754-10-81-(4-Formylphenyl)piperidine-4-carboxylic acid hydrochlorideC₁₃H₁₆ClNO₃269.73
2137756-74-0Sodium (1-((tert-butoxy)carbonyl)piperidin-4-yl)methanesulfinateC₁₁H₂₀NNaO₄S285.34
2137757-59-46-(3-Aminopyrrolidin-1-yl)-3-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione dihydrochlorideC₉H₁₆Cl₂N₄O₂283.16
2137758-06-4rac-(1R,2S)-1-Amino-1,2,3,4-tetrahydronaphthalen-2-ol hydrochlorideC₁₀H₁₄ClNO199.68
2137758-17-7Methyl 4-methyl-3-[2-methyl-5-(methylamino)-3-oxo-2,3-dihydropyridazin-4-yl]benzoateC₁₅H₁₇N₃O₃287.32
2137759-45-45-Bromo-2,7-dimethyl-(1,2,4)triazolo(1,5-a)pyridineC₈H₈BrN₃226.08
2137761-07-82-(4-{[(9H-Fluoren-9-yl)methoxy)carbonyl)-1,1-dioxidothiomorpholin-2-yl)acetic acidC₂₁H₂₁NO₆S415.47
2137761-50-12-Hydroxyethane-1-sulfinamideC₂H₇NO₂S109.15
2137762-21-9rac-(3aR,6aS)-4,4-difluoro-octahydrocyclopenta[c]pyrrole hydrochlorideC₇H₁₂ClF₂N183.63
2137762-37-73-(Chloromethyl)-5-(diethoxymethyl)-1,2,4-oxadiazoleC₈H₁₃ClN₂O₃220.66
2137763-07-42,4-Dichloro-6-(methoxymethoxy)benzene-1-sulfonyl chlorideC₈H₇Cl₃O₄S305.57
2137763-16-5(1R,5S)-3-[(tert-Butoxy)carbonyl]-5-(trifluoromethyl)-3-azabicyclo[3.1.0]hexane-1-carboxylic acidC₁₂H₁₆F₃NO₄295.26
2137763-39-2Sodium (naphthalen-2-yl)methanesulfinateC₁₁H₉NaO₂S228.25
2137765-21-81-(4-Methoxyphenyl)-1H-1,2,3-triazole-4-sulfonyl fluorideC₉H₈FN₃O₃S257.25
2137765-66-1(Octahydropyrazino[2,1-c][1,4]oxazin-9a-yl)methanol dihydrochlorideC₈H₁₈Cl₂N₂O₂245.15
2137765-72-92,5-Bis(propan-2-yl)pyrrolidine hydrochlorideC₁₀H₂₂ClN191.75
2137765-75-21,8-Dioxaspiro[4.5]decan-4-oneC₈H₁₂O₃156.18
2137765-85-4Sodium (2,4-dichlorophenyl)methane sulfinateC₇H₅Cl₂NaO₂S247.08
2137766-40-4rac-(1R,2R)-2-Hydrazinylcyclopentan-1-ol dihydrochlorideC₅H₁₄Cl₂N₂O189.09
2137766-66-4(But-3-yn-2-yl)cyclopentaneC₉H₁₄122.21
2137766-72-22-[1-Methyl-3-(propan-2-yl)-1H-1,2,4-triazol-5-yl]ethan-1-amine dihydrochlorideC₈H₁₈Cl₂N₄241.17
2137767-53-26-Chloro-7-fluoro-1-benzofuran-2-carboxylic acidC₉H₄ClFO₃214.58
2137768-06-8Imidazo(1,5-a)pyridin-6-amine dihydrochlorideC₇H₉Cl₂N₃206.08
2137768-58-0Methyl 4H,5H,6H,7H-pyrazolo[1,5-a]pyrazine-3-carboxylate hydrochlorideC₈H₁₂ClN₃O₂217.66
2137769-12-9rac-(3R,4R)-1-(((9H-Fluoren-9-yl)methoxy)carbonyl)-4-propylpyrrolidine-3-carboxylic acidC₂₃H₂₅NO₄379.46
2137769-17-41-(1-{[(9H-Fluoren-9-yl)methoxy]carbonyl}azetidin-3-yl)-5-oxopyrrolidine-3-carboxylic acidC₂₃H₂₂N₂O₅406.44
2137769-50-5(5-Bromopentyl)cyclopropaneC₈H₁₅Br191.11
2137770-14-84-(Morpholin-2-yl)benzonitrile hydrochlorideC₁₁H₁₃ClN₂O224.69
2137770-46-61-(5-Iodo-2-methylphenyl)-1H-1,2,3-triazoleC₉H₈IN₃285.09
2137771-71-02-(3-(Benzyloxy)-5-fluorophenyl)ethan-1-amine hydrochlorideC₁₅H₁₇ClFNO281.76
2137773-58-91-{[(9H-Fluoren-9-yl)methoxy]carbonyl}-4-(1H-pyrazol-1-yl)piperidine-4-carboxylic acidC₂₄H₂₃N₃O₄417.46
2137773-84-19-Hydroxy-2,7-diazaspiro[3.5]nonan-6-one, trifluoroacetic acidC₉H₁₃F₃N₂O₄270.21
2137774-27-52-(6-(Trifluoromethyl)pyridin-2-yl)acetic acid hydrochlorideC₈H₇ClF₃NO₂241.60
2137774-41-33-(3-Aminopyrrolidin-1-yl)-1,2-dihydropyrazin-2-one dihydrochlorideC₈H₁₄Cl₂N₄O253.13
2137775-19-8[1-Cyclopropyl-2-(1-methyl-1H-imidazol-5-yl)piperidin-3-yl]methanolC₁₃H₂₁N₃O235.33
2137775-24-51-(Pyrazin-2-yl)ethan-1-amine dihydrochlorideC₆H₁₁Cl₂N₃196.08
2137778-54-0tert-Butyl 3-(aminomethyl)oxolane-3-carboxylateC₁₀H₁₉NO₃201.27
2137778-73-32-(7-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4,5,6,7-tetrahydro-2H-indazol-2-yl)acetic acidC₂₄H₂₃N₃O₄417.46
2137778-74-4Methyl 5-methyl-1,2,3,4-tetrahydroquinoline-6-carboxylateC₁₂H₁₅NO₂205.26

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