• 4-Pyrimidinamine,2,6-diethyl-5-methyl-
• 2635-56-5
• C9H15 N3
• 165.2355
• .

• 4H-Pyran-4-one,3-hydroxy-6-(hydroxymethyl)-2-(4-morpholinylmethyl)-
• 1429-25-0
• C11H15 N O5
• 241.2405
• .

• 4(3H)-Pyrimidinone,2-(dimethylamino)-6-methyl-
• 19810-73-2
• C7H11 N3 O
• 243-337-0
• 153.18174
• .

• 4-Oxazolidinone,3-ethyl-5-[1-methyl-2-(1-methyl-2-pyrrolidinylidene)ethylidene]-2-thioxo-
• 41560-92-3
• C13H18 N2 O2 S
• 255-439-2
• 266.35922
• .

• 4-Quinolinecarboxylicacid, 2-(2-methylpropyl)-
• 24260-31-9
• C₁₄H₁₅NO₂
• 229.27
• .

• 4(3H)-Quinazolinone,3-(4-methoxyphenyl)-2-[[2-oxo-2-(4-phenyl-1-piperazinyl)ethyl]thio]-
• 81262-72-8
• C27H26 N4 O3 S
• 0
• .

• 4H-Pyrimido[6,1-a]isoquinolin-4-one,2-[(3-fluorophenyl)imino]-2,3,6,7-tetrahydro-9,10-dimethoxy-3,7-dimethyl-,hydrochloride (1:1)
• 108445-80-3
• C22H22 F N3 O3 . Cl H
• 431.8877
• .

• 4(5H)-Oxazolone,2-amino-5-[2-(4-chlorophenyl)-2-oxoethylidene]-
• 155717-88-7
• C11H7 Cl N2 O3
• 250.6379
• .

• 4H-Imidazol-4-one,5-ethylidene-3,5-dihydro-2-methyl-3-(5-phenyl-1,3,4-thiadiazol-2-yl)-
• 100037-21-6
• C14H12 N4 O S
• 284.3363
• .

• 4-Pyrimidinamine,3,6-dihydro-6-imino-3-methyl-, hydrochloride (1:1)
• 6961-90-6
• C5H8 N4 . Cl H
• 124.1438
• .

• 4H-1,3,8-Trioxaacenaphthylene-6-carboxylicacid, 2,2a,5,5a,8a,8b-hexahydro-4-oxo-, methyl ester, (2aR,5aS,8aS,8bS)-
• 157744-28-0
• C11H12 O6
• .

• 4-Piperidinol,1,2,5-trimethyl-5-(4-morpholinylmethyl)-4-phenyl-, 4-(4-nitrobenzoate),hydrochloride (1:2)
• 28060-48-2
• C26H33 N3 O5 . 2 Cl H
• 540.4792
• .

• 4(3H)-Pyrimidinone,2-amino-6-(fluoromethyl)-
• 1597-36-0
• C5H6 F N3 O
• 143.1190432
• .

• 4H-Imidazol-4-one,2-amino-1-ethyl-1,5-dihydro-
• 76146-27-5
• C5H9 N3 O
• 278-383-0
• 127.14446
• .

• 4,11[3',4']-Furanocyclooct[f]isobenzofuran-1,3,13,15-tetrone,3a,4,11,11a,12,16-hexahydro-
• 27957-04-6
• C18H12 O6
• .

• 4H-3,1-Benzoxazin-4-one,6,7-dimethoxy-2-methyl-
• 6286-65-3
• C11H11 N O4
• 0
• .

• 4-Oxazolidinepropanoicacid, 2,5-dioxo-, methyl ester, (R)- (9CI)
• 1676-88-6
• C7H9 N O5
• 216-828-2
• 187.15006
• .

• 4H-1-Benzopyran-4-one,5,8-dihydroxy-2-(2-hydroxyphenyl)-6,7-dimethoxy-
• 77056-21-4
• C17H14 O7
• 0
• .

• 4H,9H-Furo[2',3',4':4,5]naphtho[2,1-c]pyran-4,9-dione,2-[(O-b-D-glucopyranosyl-(1®3)-O-b-D-glucopyranosyl-(1®6)-b-D-glucopyranosyl)oxy]-1,2,3,3a,5a,6,10b,10c-octahydro-6-hydroxy-3a,10b-dimethyl-7-(1-methylethyl)-,(2R,3aS,5aS,6R,10bS,10cR)- (9CI)
• 226905-48-2
• C37H54 O21
• .

• 4-Quinolinecarboxylicacid, 6,8-dichloro-2-(3-iodophenyl)-
• 29240-62-8
• C16H8 Cl2 I N O2
• 444.0507
• .

• 4-Pyridinecarboxylicacid, 2-amino-, ethyl ester
• 13362-30-6
• C₈H₁₀N₂O₂
• 166.1772
• .

• 4H-1-Benzopyran-3-carboxaldehyde,6-chloro-4-oxo-
• 42248-31-7
• C10H5 Cl O3
• 208.5979
• .

• 4,8-Methano-2H-indeno[5,6-b]furan-2-one,3,3a,4,4a,7,7a,8,8a-octahydro-3-methyl-
• 93893-92-6
• C13H16 O2
• 299-685-9
• 204.26494
• .

• 4-Cyclohexene-1,2-dicarboxylicacid, 1,2-dibutyl ester
• 37981-16-1
• C16H26 O4
• 253-738-2
• 282.37524
• .

• 4H-1,3,4-Thiadiazin-2-amine,5,6-dihydro-4,6-dimethyl-
• 15054-10-1
• C5H11 N3 S
• 145.2259
• .

• 4H-Pyrano[3,2-b]pyridin-4-one,2-(3-bromophenyl)-
• 148190-17-4
• C14H8 Br N O2
• 302.1228
• .

• 4-Oxazolemethanol,4-ethyl-4,5-dihydro-2-(15-methylhexadecyl)-
• 93841-67-9
• C23H45 N O2
• 299-038-0
• 367.6089
• .

• 4,7-Pteridinediamine,6-(3-methylphenyl)-2-phenyl-
• 2853-78-3
• C19H16 N6
• 328.3705
• .

• 4-Piperidinecarboxylic acid,1-[3-(4-fluorophenyl)-3-oxopropyl]-4-phenyl-, ethyl ester, hydrochloride (1:1)
• 102395-65-3
• C23H26 F N O3 . Cl H
• 419.9168
• .

• 4,9:5,8-Dimethano-1H-benz[f]isoindole-1,3(2H)-dione(9CI)
• 15006-77-6
• C14H7 N O2
• .

• 4H-Imidazol-4-one,5-[(2-bromophenyl)methylene]-3,5-dihydro-3-[[(4-nitrophenyl)methylene]amino]-2-phenyl-
• 126293-42-3
• C23H15 Br N4 O3
• 475.2942
• .

• 4(1H)-Pyrimidinone,2,3-dihydro-5-[(2-hydroxy-1-naphthalenyl)methyl]-6-phenyl-2-thioxo-
• 14513-15-6
• C21H16 N2 O2 S
• 0
• .

• 4-Quinolineacetic acid,2-methyl-, methyl ester, hydriodide (1:1)
• 100749-52-8
• C13H13 N O2 . H I
• 343.1602
• .

• 4(3H)-Quinazolinone,2-methyl-3-[(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]-
• 106924-02-1
• C18H14 N4 O2
• 318.3294
• .

• 4-Pyridinecarboxylicacid, 2-[(2-chloro-6-nitrophenyl)methylene]hydrazide
• 128153-92-4
• C13H9 Cl N4 O3
• 304.6886
• .

• 4-methoxy-N-[2-[2-(1-methyl-2-piperidyl)ethyl]phenyl]benzamide
• 37612-13-8
• C₂₂H₂₈N₂O₂
• 0
• .

• 4-Hexyn-3-one,2,2-dimethyl-
• 71932-99-5
• C8H12 O
• 0
• .

• 4H-1-Benzopyran-4-one,7-hydroxy-5-methoxy-2-(4-methoxyphenyl)-6-methyl-
• 127324-51-0
• C18H16 O5
• .

• 4-Thiazoleethanethioicacid, 2-amino-a-(methoxyimino)-,S-2-benzothiazolyl ester
• 94088-75-2
• C13H10 N4 O2 S3
• 302-077-9
• 350.4391
• .

• 4(1H)-Pyrimidinone,2,3-dihydro-1,3-dimethyl-2-thioxo-
• 1194-71-4
• C6H8 N2 O S
• 156.2055
• .

• 4H-Cyclohepta[4,5]thieno[2,3-d]pyrimidin-4-one,3-amino-3,5,6,7,8,9-hexahydro-2-(phenylmethyl)-
• 120354-27-0
• C18H19 N3 O S
• 325.428
• .

• 4,6(1H,5H)-Pyrimidinedione,5-ethyldihydro-5-(4-methylphenyl)-2-thioxo-
• 84030-12-6
• C13H14 N2 O2 S
• 281-782-2
• 262.32746
• .

• 4(3H)-Pyrimidinone,2-(2-propen-1-ylthio)-
• 31170-22-6
• C7H8 N2 O S
• 168.2162
• .

• 4H-Bis[1,3]benzodioxolo[5,6-a:4',5'-g]quinolizine,6,7,12b,13-tetrahydro-13-methyl-, (12bR,13S)-
• 32043-26-8
• C20H19 N O4
• .

• 4H-1-Benzopyran-4-one,7-[(2-O-a-L-arabinofuranosyl-b-D-galactopyranosyl)oxy]-5-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-
• 28543-46-6
• C27H30 O15
• 0
• .

• 4(1H)-Quinolinone,6-methoxy-
• 13788-72-2
• C₁₀H₉NO₂
• 175.184
• .

• 4(1H)-Pyrimidinone,6-amino-2,3-dihydro-1-(4-iodophenyl)-2-thioxo-
• 16837-13-1
• C10H8 I N3 O S
• 345.1595
• .

• 4-Quinolinecarboxylicacid, 3-methyl-2-phenyl-
• 43071-45-0
• C₁₇H₁₃NO₂
• 263.2906
• .

• 4,4-Carbonimidoylbis(N,N-diethylaniline) acetate
• 84282-03-1
• C23H33N3O2
• 282-649-1
• 383.52702
• .

• 4H-1,2,4-Benzothiadiazine,3-(3,5-dimethyl-1H-pyrazol-1-yl)-4-ethyl-, 1,1-dioxide
• 107089-83-8
• C14H16 N4 O2 S
• 304.3674
• .