• 4,12,23,27,42-Hexatetracontapentaene-1,18,21,45-tetrayne-3,6,20,44-tetrol,(3S,4E,12Z,20S,23E,27Z,42E,44S)-
• 128646-05-9
• C46H68 O4
• .

• 4,7-Etheno-1H-cyclobut[f]isoindole-1,3(2H)-dione,3a,4,4a,6a,7,7a-hexahydro-2-[4-[4-(2-pyrimidinyl)-1-piperazinyl]butyl]-,monohydrochloride, (3aR,4R,4aR,6aS,7S,7aS)-rel- (9CI)
• 114374-97-9
• C24H29 N5 O2 . Cl H
• 419.5194
• .

• 4H-[1,2,4]Triazolo[4,3-a][1,4]benzodiazepine,8-chloro-6-(3,4-dimethoxyphenyl)-1-[(methylthio)methyl]-
• 115765-00-9
• C20H19 Cl N4 O2 S
• 414.9085
• .

• 4-Piperidinol,1-(cyclopropylmethyl)-4-phenyl-
• 102071-52-3
• C15H21 N O
• 231.3333
• .

• 4-Hexenoic acid,6-[(1S,2R,3R,4R)-3-[[[[(4-chlorophenyl)amino]carbonyl]hydrazono]methyl]-7-oxabicyclo[2.2.1]hept-2-yl]-,(4Z)- (9CI)
• 142116-37-8
• C20H24 Cl N3 O4
• 405.8753
• .

• 4H-Pyrazino[3,2,1-jk]carbazole,5,6-dihydro-8-methyl-, hydrochloride (1:1)
• 15932-34-0
• C15H14 N2 . Cl H
• 258.746
• .

• 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-[(1-oxo-3-octenyl)amino]-, [2S-[2a,5a,6b(E)]]- (9CI)
• 137593-45-4
• C16H24 N2 O4 S
• 0
• .

• 4(3H)-Quinazolinone,6,8-dibromo-3-(2-methoxyphenyl)-2-[[(1-methylpropyl)sulfonyl]methyl]-
• 108674-21-1
• C20H20 Br2 N2 O4 S
• 544.2568
• .

• 4-Pyridinecarboxylicacid, 2-[3-[[(2,4-dichlorophenyl)methyl]amino]-3-oxopropyl]hydrazide
• 13012-70-9
• C16H16 Cl2 N4 O2
• 367.2298
• .

• 4H-Anthra[1,2-b]pyran-4,7,12-trione,11-hydroxy-5-methyl-8-[2,3,6-trideoxy-3-(dimethylamino)-b-D-arabino-hexopyranosyl]-10-[2,3,6-trideoxy-3-(dimethylamino)-5-C-hydroxy-3-C-methylhexopyranosyl]-2-(3,3',3'-trimethyl[2,2'-bioxiran]-3-yl)-(9CI)
• 116988-30-8
• C42H52 N2 O12
• 0
• .

• 4-Acridinecarboxamide,N-[4-(aminosulfonyl)phenyl]-
• 165121-46-0
• C20H15 N3 O3 S
• 377.4164
• .

• 4-Pyrimidinamine,2-methoxy-6-[(3,4,5-trimethoxyphenyl)methyl]-
• 143467-57-6
• C15H19 N3 O4
• 305.3291
• .

• 4(3H)-Pyrimidinone,2-[[1-(1H-benzimidazol-2-yl)-4-piperidinyl]methylamino]-
• 108612-57-3
• C17H20 N6 O
• 0
• .

• 4-[4-(4,5-dihydro-1H-imidazol-2-yl)phenyl]-2-phenyl-pyrimidine
• 160522-98-5
• C₁₉H₁₆N₄
• 0
• .

• 4H-1,3-Benzoxazin-4-one,2,3-dihydro-2-thioxo-
• 10021-35-9
• C8H5 N O2 S
• 179.20
• .

• 4H-Imidazol-4-one,3,5-dihydro-5-(1H-indol-3-ylmethylene)-3-[4-(4-methylphenoxy)phenyl]-2-phenyl-
• 127662-62-8
• C31H23 N3 O2
• 469.5332
• .

• 4(1H)-Pyrimidinone,2,6-diamino-5-(b-D-glucopyranosyloxy)-
• 152-93-2
• C10H16 N4 O7
• 205-809-4
• 304.25664
• .

• 4-chloro-8-(dichloromethyl)-10,10-dioxo-10$l^{6}-thia-7,9-diazabicyclo[4.4.0]deca-1,3,5-triene-3-sulfonamide; 3,5-diamino-6-chloro-N-(diaminomethylidene)pyrazine-2-carboxamide
• 138258-83-0
• C₁₄H₁₆Cl₄N₁₀O₅S₂
• 0
• .

• 4H-1,3-Oxazine,5,6-dihydro-4,4,6-trimethyl-2-[2-(1-naphthalenyl)ethenyl]-, hydrochloride, (E)-(9CI)
• 100098-83-7
• C19H21 N O . Cl H
• 0
• .

• 4-Piperidinol,4-phenyl-1-[2-(phenylamino)ethyl]-, 4-propanoate, hydrochloride (1:2)
• 10434-53-4
• C22H28 N2 O2 . 2 Cl H
• 352.4699
• .

• 4H-1-Benzopyran-4-one,6-[6-(5,7-dihydroxy-4-oxo-4H-1-benzopyran-2-yl)-2,3-dihydroxyphenyl]-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-
• 116383-34-7
• C30H18 O12
• 0
• .

• 4H-1-Benzopyran-4-one,7-[[2-O-(6-O-acetyl-b-D-glucopyranosyl)-b-D-glucopyranosyl]oxy]-2-(3,4-dihydroxyphenyl)-5-hydroxy-
• 135546-08-6
• C29H32 O17
• 0
• .

• 4H-Imidazo[1,5-a][1,4]benzodiazepine-3-carboxylicacid, 8-chloro-6-phenyl-, ethyl ester
• 117047-25-3
• C20H16 Cl N3 O2
• .

• 4H-1-Benzopyran-4-one,3-[(O-6-deoxy-a-L-mannopyranosyl-(1®6)-O-[a-D-glucopyranosyl-(1®4)]-b-D-glucopyranosyl)oxy]-2-(3,4-dihydroxyphenyl)-5,7-dihydroxy-
• 130603-71-3
• C33H40 O21
• 424-170-4
• 432.5928
• .

• 4-Piperidinol,1-(4-phenoxy-2-buten-1-yl)-4-phenyl-, 4-propanoate, hydrochloride (1:1)
• 128864-81-3
• C24H29 N O3 . Cl H
• 0
• .

• 4(3H)-Pyrimidinone,5-ethoxy-2-ethyl-
• 103980-62-7
• C8H12 N2 O2
• 0
• .

• 4H-1-Benzopyran-4-one,3-[[6-O-(6-deoxy-a-L-mannopyranosyl)-4-O-[(2Z)-3-(4-hydroxyphenyl)-1-oxo-2-propen-1-yl]-b-D-galactopyranosyl]oxy]-5,7-dihydroxy-2-(4-hydroxyphenyl)-
• 115794-36-0
• C36H36 O17
• .

• 4-Benzofuranacetamide,N-methyl-N-[(5R,7S,8S)-7-(1-pyrrolidinyl)-1-oxaspiro[4.5]dec-8-yl]-
• 124378-77-4
• C24H32 N2 O3
• 0
• .

• 4-Morpholineacetamide,N-(1,1-dimethylhexyl)-, hydrochloride (1:1)
• 109258-48-2
• C14H28 N2 O2 . Cl H
• 292.8453
• .

• 4,8-Methano-2H,4H,6H-furo[4,3,2-kl]oxireno[j][3]benzoxocin-2-one,6-(3-furanyl)octahydro-8,8b,11-trimethyl-, (1aS,3aS,4R,6S,8R,8aR,8bS,10aR,11S)-(9CI)
• 156979-71-4
• C20H24 O5
• .

• 4(3H)-Pteridinone,2-amino-5,8-dihydro-6-(2-hydroxy-1-oxopropyl)-
• 14722-73-7
• C9H11 N5 O3
• 237.2153
• .

• 4(3H)-Quinazolinone,3-[[[2-(4-chlorophenyl)diazenyl]phenylmethylene]amino]-2-methyl-
• 110605-02-2
• C22H16 Cl N5 O
• 401.8483
• .

• 4H-1-Benzopyran-4-one,5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-6,7,8-trimethoxy-
• 16520-78-8
• C19H18 O8
• 374.3414
• .

• 4,7-Ethano-1H-isoindole-1,3(2H)-dione,2-(2-ethylhexyl)-3a,4,7,7a-tetrahydro-4-methyl-7-(1-methylethyl)-
• 13358-11-7
• C22H35 N O2
• 345.5188
• .

• 4,7-Epoxyisobenzofuran-5-carboxylicacid, octahydro-1,3-dioxo-, ethyl ester, (3aa,4b,5a,7b,7aa)- (9CI)
• 127311-88-0
• C11H12 O6
• 0
• .

• 4aH-Cycloprop[e]azulen-4a-ol,decahydro-3,3,5,7b-tetramethyl-, (1aS,4aR,5R,7aS,7bR)-
• 104975-19-1
• C15H26 O
• .

• 4H-1,2,4-Triazole,3-(4-fluorophenyl)-4-(4-methylphenyl)-5-(phenoxymethyl)-
• 141078-94-6
• C22H18 F N3 O
• 0
• .

• 4H,10H-9a,13-Epoxy-15a,7-(epoxyethano)azepino[1,2-a]naphtho[2,1-g]quinoline-4,6,18(6aH)-trione,1,4a,5,7,7a,8,9,11,12,13,14,16,16a,16b-tetradecahydro-5-(hydroxymethyl)-2,7,7a,11,16a-pentamethyl-,(4aR,5S,6aS,7S,7aS,9aS,11S,13R,15aR,16aS,16bR)- (9CI)
• 159509-36-1
• C30H41 N O6
• .

• 4H-1-Benzopyran-4-one,2-(2-fluorophenyl)-
• 1645-20-1
• C15H9 F O2
• 240.2292
• .

• 4H-1-Benzopyran-4-one,3-[[6-O-(6-deoxy-a-L-mannopyranosyl)-4-O-[(2E)-3-(4-hydroxyphenyl)-1-oxo-2-propen-1-yl]-b-D-galactopyranosyl]oxy]-5,7-dihydroxy-2-(4-hydroxyphenyl)-
• 115713-36-5
• C36H36 O17
• .

• 4H-1-Benzopyran-4-one,7-hydroxy-2-(4-hydroxyphenyl)-3-methoxy-5,6-dimethyl-
• 132020-55-4
• C18H16 O5
• 0
• .

• 4(3H)-Pteridinone,2-amino-7,8-dihydro-6-methyl-
• 17377-13-8
• C7H9 N5 O
• 0
• .

• 4H-Pyrido[2,1-a]phthalazine-1-carboxamide,10-chloro-N,N-dimethyl-4-oxo-3-phenyl-
• 110924-84-0
• C21H16 Cl N3 O2
• 377.8236
• .

• 4-Imidazolidinone,3-(2-methylbenzoyl)-5-[(3-methylphenyl)methylene]-2-thioxo-
• 112806-20-9
• C19H16 N2 O2 S
• 336.4075
• .

• 4,9[1',2']-Benzeno-2H-benz[f]isoindolium,1,3,3a,4,9,9a-hexahydro-2-methyl-2-[3-(trimethylammonio)propyl]-, diiodide(9CI)
• 152-81-8
• C25H34 N2 . 2 I
• 616.3598
• .

• 4(3H)-Pyrimidinone,5-bromo-
• 19808-30-1
• C4H3 Br N2 O
• 243-334-4
• 174.9834
• .

• 4H-Furo[2,3-b][1]benzopyran-4-one,2,3-dihydro-2,3,5-trimethyl-2-(4-methyl-3-penten-1-yl)-, (2R,3S)-rel-
• 101622-91-7
• C20H24 O3
• .

• 4-Morpholineacetamide,N-(2-benzoyl-4-nitrophenyl)-
• 102996-66-7
• C19H19 N3 O5
• .

• 4-Thiomorpholinecarbothioicacid, S-(4-oxo-4H-pyrido[1,2-a]pyrimidin-9-yl) ester
• 125209-33-8
• C13H13 N3 O2 S2
• 0
• .

• 4(3H)-Quinazolinone,3-[[(5-nitro-2-furanyl)methylene]amino]-
• 1157-41-1
• C13H8 N4 O4
• 284.227
• .