• 5'-Uridylic acid, 2',3'-diacetate, compd. with pyridine (1:1)
• 137362-73-3
• C₁₃H₁₇N₂O₁₁P·C₅H₅N
• .

• 5-Isothiazolecarboxylic acid, 4-amino-3-phenyl-, ethyl ester
• 65237-13-0
• C₁₂H₁₂N₂O₂S
• .

• 5H-Cyclohepta[b]pyridine-3-carbonitrile, 2-amino-6,7,8,9-tetrahydro-
• 65242-20-8
• C₁₁H₁₃N₃
• .

• 5(4H)-Oxazolone, 4-[(2-hydroxy-5-nitrophenyl)methylene]-2-phenyl-
• 313372-26-8
• C₁₆H₁₀N₂O₅
• .

• 5-(2,5-dimethylbenzyl)-6-oxo-2-thioxo-1,2,3,6-tetrahydropyrimidine-4-carbaldehyde
• 31349-87-8
• C₁₄H₁₄N₂O₂S
• 274.3382
• .

• 5-[(2-methylnaphthalen-1-yl)methyl]-6-oxo-2-thioxo-1,2,3,6-tetrahydropyrimidine-4-carbaldehyde
• 31349-89-0
• C₁₇H₁₄N₂O₂S
• 310.3703
• .

• 5H-Tetrazole-5-thione, 1,2-dihydro-4-phenyl-, copper(2+) salt
• 15899-94-2
• C₇H₆N₄S·1/₂Cu
• .

• 5-Benzofuranmethanol,2,3-dihydro-2-(4-hydroxy-3-methoxyphenyl)-7-methoxy-3-methyl-
• 141357-76-8
• C₁₈H₂₀O₅
• .

• 5-Oxazolidinone,4-(diphenylphosphinyl)-3-methyl-2,2-bis(trifluoromethyl)-
• 141364-28-5
• C₁₈H₁₄F₆NO₃P
• .

• 5H-Phosphorino[1,2-b][1,2]thiaphosphole-6-carboxylic acid,6,7-dihydro-6-methyl-2,5-diphenyl-, methyl ester, 8-sulfide
• 141368-99-2
• C₂₂H₂₁O₂PS₂
• .

• 5-Heptenoic acid,7-amino-2-[[(1,1-dimethylethoxy)carbonyl]amino]-6-fluoro-, (2S,5E)-
• 463967-78-4
• C₁₂H₂₁FN₂O₄
• .

• 5-Thiazolecarboxaldehyde,2-[[4-[bis(2-phenylethyl)amino]phenyl]azo]-4-chloro-
• 140234-77-1
• C₂₆H₂₃ClN₄OS
• .

• 5-Thiazolecarboxaldehyde, 4-chloro-2-[[4-(dimethylamino)phenyl]azo]-
• 140234-84-0
• C₁₂H₁₁ClN₄OS
• .

• 5,7-Octadien-2-ol, 3-ethenyl-
• 29539-06-8
• C₁₀H₁₆O
• .

• 5'-Uridylic acid, 2',3'-O-(1-methylethylidene)-
• 55728-64-8
• C₁₂H₁₇N₂O₉P
• .

• 5-(acetyloxy)-6-methoxycyclohexa-1,3-diene-1-carboxylic acid
• 55712-79-3
• C₁₀H₁₂O₅
• 212.1993
• .

• 5-Heptenal, 4,4,6-trimethyl-
• 55739-96-3
• C₁₀H₁₈O
• .

• 5-Oxazolidinecarboxylic acid, 2-oxo-4-[(phenylmethoxy)methyl]-,(4S,5R)-
• 102608-46-8
• C₁₂H₁₃NO₅
• .

• 5-(5-{[(2S)-2-(dimethylamino)pyrrolidin-1-yl]methyl}thiophen-3-yl)-3-[1-(ethylsulfonyl)piperidin-4-yl]-1H-indole-7-carboxamide
• 1026487-24-0
• C₂₇H₃₇N₅O₃S₂
• 543.7444
• .

• 5-Oxa-1,2,9-triazaspiro[5.5]undecane, 2-methyl-9-(phenylmethyl)-
• 387883-96-7
• C₁₅H₂₃N₃O
• .

• 5-Hexen-2-ol, 6-phenyl-, (Z)-
• 169531-02-6
• C₁₂H₁₆O
• .

• 5-Thiazolecarboxylic acid,2-[[3,5-bis(1,1-dimethylethyl)-4-hydroxybenzoyl]amino]-4-phenyl-, ethylester
• 500530-24-5
• C₂₇H₃₂N₂O₄S
• .

• 5-amino-3,3-dimethyl-1,3-dihydro-2H-indol-2-one
• 31523-05-4
• C₁₀H₁₂N₂O
• 176.2151
• .

• 5-Quinolineacetic acid, 7,8-dihydro-, ethyl ester
• 62741-59-7
• C₁₃H₁₅NO₂
• .

• 5-Pyrimidinecarboxamide,N-hexyl-2-[[3-(1-methylethyl)-2-phenyl-5-oxazolidinyl]methoxy]-
• 54127-82-1
• C₂₄H₃₄N₄O₃
• .

• 5-Isobenzofurancarboxaldehyde, 1,3-dihydro-1-oxo-
• 333333-34-9
• C₉H₆O₃
• .

• 5-fluoro-2,4-dioxo-N-(2-phenylethyl)-3,4-dihydropyrimidine-1(2H)-carboxamide
• 65238-84-8
• C₁₃H₁₂FN₃O₃
• 277.2511
• .

• 5,7-diethyl[1,2,4]triazolo[4,3-a]pyrimidine
• 65267-54-1
• C₉H₁₂N₄
• 176.2184
• .

• 5-Heptynoic acid,7-[4-(4,4-dimethyl-3-oxo-1-octenyl)-5-methoxy-1-(1-methylethyl)-2-oxo-3-pyrrolidinyl]-, methyl ester
• 64079-74-9
• C₂₆H₄₁NO₅
• .

• 5-Heptynoic acid,7-[4-(4-ethoxy-3-oxo-4-phenyl-1-butenyl)-5-methoxy-1-(1-methylethyl)-2-oxo-3-pyrrolidinyl]-, methyl ester
• 64079-76-1
• C₂₈H₃₇NO₆
• .

• 5-Heptynoic acid,7-[4-(4-ethoxy-3-hydroxy-4-phenyl-1-butenyl)-5-methoxy-1-(1-methylethyl)-2-oxo-3-pyrrolidinyl]-, 1-methylethyl ester
• 64079-80-7
• C₃₀H₄₃NO₆
• .

• 5H-Pyrazolo[4,3-c]pyridine-5-carboxamide,3-[4-(dimethylamino)phenyl]-1,4,6,7-tetrahydro-N-(1-methylethyl)-
• 661487-27-0
• C₁₈H₂₅N₅O
• .

• 5-[(2E)-but-2-en-1-ylsulfanyl]-1-(1-methylethyl)-1H-1,2,4-triazol-3-yl ethanesulfonate
• 61800-05-3
• C₁₁H₁₉N₃O₃S₂
• 305.4169
• .

• 5-[(diethylamino)methyl]-3,3-diethylpyridine-2,4(1H,3H)-dione
• 55748-87-3
• C₁₄H₂₄N₂O₂
• 252.3526
• .

• 5-Heptenal, 4,4-dimethyl-, (Z)-
• 55739-93-0
• C₉H₁₆O
• .

• 5-Heptenal, 4,4-dimethyl-, (E)-
• 55739-92-9
• C₉H₁₆O
• .

• 5-(3,5-dioxo-4-phenyl-1,2,4-triazolidin-1-yl)-1,3-dimethylpyrimidine-2,4(1H,3H)-dione
• 63376-58-9
• C₁₄H₁₃N₅O₄
• 315.2841
• .

• 5-ethyl-2-(4-fluorophenyl)-9-[4-(4-fluorophenyl)-4-oxobutyl]-1,3-dioxa-9-azoniaspiro[5.5]undecane chloride
• 63377-13-9
• C₂₆H₃₂ClF₂NO₃
• 479.987
• .

• 5-Isoxazolecarboxylic acid, 4,5-dihydro-3-propyl-, ethyl ester
• 120802-96-2
• C₉H₁₅NO₃
• .

• 5-(2,5-dimethoxybenzyl)-5-methylimidazolidine-2,4-dione
• 18776-65-3
• C₁₃H₁₆N₂O₄
• 264.2771
• .

• 5-benzyl-6-oxo-2-thioxo-1,2,3,6-tetrahydropyrimidine-4-carbaldehyde thiosemicarbazone
• 31448-87-0
• C₁₃H₁₃N₅OS₂
• 319.4052
• .

• 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid,3-[(acetyloxy)methyl]-8-oxo-7-[(trimethylsilyl)amino]-, trimethylsilyl ester,(6R,7R)-
• 31461-04-8
• C₁₆H₂₈N₂O₅SSi₂
• .

• 5(4H)-Oxazolone, 2-[2-(acetyloxy)phenyl]-4-[(4-azidophenyl)methylene]-
• 105988-71-4
• C₁₈H₁₂N₄O₄
• .

• 5-Isoxazolamine, 3-methyl-N-(2,2,2-trifluoroethyl)-
• 140454-93-9
• C₆H₇F₃N₂O
• .

• 5-Nonen-2-one, 3,3-dimethyl-, (E)-
• 140870-84-4
• C₁₁H₂₀O
• .

• 5-Isoxazolecarboxylic acid, 3-butyl-
• 14716-93-9
• C₈H₁₁NO₃
• .

• 5-Thiazolecarboxamide,2-(3-amino-2-hydroxypropoxy)-N-(4-methylhexyl)-
• 62435-90-9
• C₁₄H₂₅N₃O₃S
• .

• 5-Thiazolecarbonyl chloride, 2-bromo-
• 62435-93-2
• C₄HBrClNOS
• .

• 5H-1,4-Benzodiazepin-5-one,3,4-dihydro-4-methyl-2-[(2-phenylethyl)amino]-
• 62436-09-3
• C₁₈H₁₉N₃O
• .

• 5H-1,4-Benzodiazepin-5-one,7-chloro-3,4-dihydro-4-methyl-2-[(2-phenylethyl)amino]-
• 62436-10-6
• C₁₈H₁₈ClN₃O
• .