• 4H-Cyclopentapyrimidin-4-one,3,5,6,7-tetrahydro-2-(methylthio)-
• 3087-14-7
• C8H10 N2 O S
• 182.2428
• .

• 4-Pyrimidinecarboxaldehyde,1,2,3,6-tetrahydro-5-[(4-nitrophenyl)methyl]-6-oxo-2-thioxo-
• 21326-32-9
• C12H9 N3 O4 S
• 291.2826
• .

• 4H-1-Benzopyran-4-one,oxime
• 61348-46-7
• C9H7 N O2
• 161.1574
• .

• 4(3H)-Pyrimidinone, 2,6-diamino-5-[2-(2,5-dimethylphenyl)diazenyl]-
• 30188-99-9
• C12H14 N6 O
• 258.2792
• .

• 4a(2H)-Naphthalenol,1-[2-(3-furanyl)ethyl]octahydro-1,2,5,5-tetramethyl-, (1R,2S,4aR,8aS)-
• 76215-27-5
• C20H32 O2
• 0
• .

• 4-Quinazolinamine,2-[2-(3,3-dimethyl-1-triazen-1-yl)phenyl]-
• 62888-13-5
• C16H16 N6
• 292.3384
• .

• 4-Thiazolidinone,3-[2-(2-chloro-13-phenyl-7H-dibenzo[d,h][1,3,6]triazonin-6-yl)ethyl]-2-[(4-ethoxyphenyl)imino]-
• 103687-07-6
• C33H28 Cl N5 O2 S
• .

• 4-Quinolinol,4-ethenyl-1-ethyldecahydro-2-methyl-, (2a,4a,4ab,8aa)- (9CI)
• 38463-59-1
• C14H25 N O
• 223.3544
• .

• 4-Carboxylbenzocyclobutene
• 875-94-5
• C₉H₈O₂
• 148.15862
• .

• 4-Quinolinecarboxylicacid, ethyl ester
• 10447-29-7
• C12H11 N O2
• 201.2212
• .

• 4H-1-Benzopyran-4-one,8-[[3-[4-(2-methoxyphenyl)-1-piperazinyl]propyl]sulfonyl]-3-methyl-2-phenyl-,hydrochloride (1:1)
• 152735-58-5
• C30H32 N2 O5 S . Cl H
• .

• 4H-Dibenzo[de,g]quinoline-10,11-diol, 5,6,6a,7-tetrahydro-6-propyl-, hydriodide(1:1)
• 40285-06-1
• C19H21 N O2 . H I
• 295.3755
• .

• 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 3,3-dimethyl-7-oxo-6-[(phenylsulfoacetyl)amino]-,disodium salt, [2S-[2a,5a,6b(S*)]]- (9CI)
• 36417-90-0
• C16H18 N2 O7 S2 . 2 Na
• 253-025-6
• 458.41698
• .

• 4H-Thiopyran-4-one,tetrahydro-, oxime
• 6309-59-7
• C5H9 N O S
• 131.1961
• .

• 4,5,7-trifluoro-3H-benzoimidazole
• 2686-72-8
• C₇H₃F₃N₂
• 0
• .

• 4-Octene-2,6-diyne-1,8-dione,1,8-di-2-thienyl-
• 120381-54-6
• C16H8 O2 S2
• 296.3635
• .

• 4-Pyrimidinol,3,4,5,6-tetrahydro-3-(4-methoxyphenyl)-4,6,6-trimethyl-2-(methylthio)-,hydriodide (1:1)
• 73322-16-4
• C15H22 N2 O2 S . H I
• 422.3248
• .

• 4-Azulenol,7-(1,5-dimethyl-1-hexen-1-yl)-3,3a,4,5,6,8a-hexahydro-1,4-dimethyl-, (3aR,4S,8aS)-rel-(+)-
• 160669-38-5
• C20H32 O
• .

• 4-Pyridinecarboxylicacid, 2-[(4-methoxyphenyl)methylene]hydrazide
• 893-42-5
• C14H13 N3 O2
• 255.2719
• .

• 4(3H)-Pyrimidinone,2-amino-5,6-dihydro-6-(2-hydroxy-5-methylphenyl)-
• 68845-89-6
• C11H13 N3 O2
• 219.2398
• .

• 4,5-Pyrimidinediamine,N4-butyl-6-chloro-
• 41259-67-0
• C₈H₁₃ClN₄
• 200.6686
• .

• 4-Thiazolidinone,5-[(3-iodophenyl)methylene]-3-(2-propen-1-yl)-2-thioxo-
• 92903-78-1
• C13H10 I N O S2
• 387.2591
• .

• 4H-Pyrazolo[3,4-d]pyrimidin-4-one,1,5-dihydro-1,5,6-trimethyl-
• 88320-49-4
• C8H10 N4 O
• 178.1912
• .

• 4(3H)-Pyrimidinethione, 6-methyl-2-(methylthio)-
• 6310-04-9
• C6H8 N2 S2
• 172.2711
• .

• 4,7-Methano-1H-indene-5,?-dimethanamine,N,N'-bis(3-aminopropyl)octahydro-(9CI)
• 76364-73-3
• C18H36 N4
• 278-427-9
• .

• 4(3H)-Pyrimidinone, 2,3-diamino-6-(trifluoromethyl)-
• 95095-71-9
• C₅H₅F₃N₄O
• 194.11
• .

• 4-Thiazolidinone,3-cyclohexyl-5-[4-(3-ethyl-2(3H)-benzothiazolylidene)-1-methyl-2-buten-1-ylidene]-2-thioxo-
• 85049-99-6
• C23H26 N2 O S3
• 285-273-6
• 442.66034
• .

• 4-(5-formyl-2-furyl)-2-hydroxy-benzoate
• 436088-45-8
• C₁₂H₇O₅-
• 232.19
• .

• 4-Thiazolidinone,3-(4-methylphenyl)-2-[[(2-naphthalenylamino)methyl]imino]-
• 74399-92-1
• C21H19 N3 O S
• 361.4601
• .

• 4H-[1,2,4]Triazolo[4,3-a][1,4]benzodiazepine,8-chloro-6-(2-chlorophenyl)-1-[(phenylthio)methyl]-
• 85677-81-2
• C23H16 Cl2 N4 S
• 0
• .

• 4(1H)-Quinazolinone,2,3-dihydro-2-thioxo-
• 13906-09-7
• C8H6 N2 O S
• 237-676-3
• 178.21
• .

• 4-Quinazolinamine,N-methyl-
• 7154-47-4
• C9H9 N3
• 159.1879
• .

• 4-Thiazolidinone,5-[(4-bromophenyl)methyl]-2,3,5-triphenyl-
• 35327-78-7
• C28H22 Br N O S
• 500.4494
• .

• 4,5-Heptadienoic acid,7-[(1R,2R,3R)-3-hydroxy-2-[(3R)-3-hydroxy-4-phenylbutyl]-5-oxocyclopentyl]-
• 106847-47-6
• C22H28 O5
• .

• 4(3H)-Pyrimidinone, 6-amino-2-(dimethylamino)-5-(2-phenyldiazenyl)-
• 7154-52-1
• C12H14 N6 O
• 258.2792
• .

• 4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylicacid, 6-[[3-carboxy-1-oxo-3-(4-propoxyphenyl)propyl]amino]-3,3-dimethyl-7-oxo-,[2S-(2a,5a,6b)]- (9CI)
• 60947-79-7
• C21H26 N2 O7 S
• 450.5053
• .

• 4(1H)-Quinolinone, 7-chloro-2,3-dihydro-
• 21617-15-2
• C9H8 Cl N O
• 244-481-7
• 181.61892
• .

• 4,6,8-Decatrienamide,3-hydroxy-2,2,4-trimethyl-10-(5-oxazolyl)- (9CI)
• 135968-71-7
• C16H22 N2 O3
• .

• 4-Pyrimidinamine,2-[(phenylmethyl)thio]-N-2-propen-1-yl-
• 6203-96-9
• C14H15 N3 S
• 257.354
• .

• 4H-1-Benzopyran-4-one,3-amino-6-chloro-2-phenyl-
• 70460-43-4
• C15H10 Cl N O2
• 271.6984
• .

• 4-Thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylicacid, 6-[(1R)-1-(acetyloxy)ethyl]-7-oxo-, sodiumsalt, (5S,6S)- (9CI)
• 174157-74-5
• C10H11 N O5 S . Na
• .

• 4-amino-N-(4-methoxyphenyl)benzamide
• 891-35-0
• C₁₄H₁₄N₂O₂
• 0
• .

• 4(1H)-Pyridinone,1-(4-chlorophenyl)-2-methyl-6-phenyl-
• 7143-75-1
• C18H14 Cl N O
• 295.7629
• .

• 4-Pyrimidinecarboxylicacid, 2-(butylthio)-1,6-dihydro-6-oxo-
• 6308-29-8
• C9H12 N2 O3 S
• 228.2682
• .

• 4H-Imidazol-4-one,3,5-dihydro-
• 1968-28-1
• C3H4 N2 O
• 84.0767
• .

• 4H-Imidazol-4-one,3,5-dihydro-2-methyl-5-[(2-phenyl-1H-indol-3-yl)methylene]-3-(1,3,4-thiadiazol-2-yl)-
• 143658-84-8
• C21H15 N5 O S
• 0
• .

• 4,5-Pyridazinediamine,3-methoxy-6-methyl-
• 6970-07-6
• C6H10 N4 O
• 154.1698
• .

• 4(3H)-Quinazolinethione, 7-chloro-
• 6967-32-4
• C8H5 Cl N2 S
• 196.6567
• .

• 4H-1-Benzothiopyran-4-one,3-(chloromethyl)-2-[3-(hydroxymethyl)-4-methylphenyl]-
• 93367-36-3
• C18H15 Cl O2 S
• 330.8285
• .

• 4,21-Dioxabicyclo[15.3.1]heneicosa-9,15,18-trien-3-one,1,11-dihydroxy-5-[(1R,3R,4S,5S)-4-hydroxy-1,3,5-trimethyl-6-oxooctyl]-6,8,16,18-tetramethyl-,(1R,5S,6R,8R,9E,11R,15E,17R)- (9CI)
• 33538-64-6
• C34H56 O7
• 0
• .