4-nitro-N-[(4,4,11,11-tetramethyl-3,5,7,10,12-pentaoxatricyclo[7.3.0.02,6]dodecan-8-yl)methyldiazenyl]aniline

4-chloro-2-(2-hydroxyethyl)-5-[2-hydroxyethyl(methyl)amino]pyridazin-3-one

4-butyl-N'-[2-[(5-methyl-1H-imidazol-4-yl)methylsulfanyl]ethyl]-3-oxo-1H-pyrazole-2-carboximidamide

4-methyl-N'-phenylbenzenecarboximidamide

4-phenyl-1,3,4-thiadiazin-5-one

4,5-bis(2,5-dichloroanilino)cyclopent-2-en-1-one

4,6-dimethyl-2-phenyl-5H-1,3,5,2λ5-triazaphosphinine 2-oxide

4-oxidobenzo[f][1,7]naphthyridin-4-ium

4H-1,3,4-benzoxadiazepin-5-one

4-[[(2-cyclohex-2-en-1-ylsulfanyl-1,3-benzothiazol-6-yl)amino]methyl]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione

4-ethyl-6-methoxy-7-(oxiran-2-ylmethoxy)quinazoline

4-amino-5-[[1-(1-carboxyethylamino)-1-oxopropan-2-yl]amino]-5-oxopentanoic acid

4-(3,4-dimethoxyphenyl)-N-prop-2-enyl-1,3-thiazol-2-amine

4-[2-(5-chloropentylimino)hydrazinyl]benzonitrile

4-bromo-3-(diethylamino)-1-methoxy-3,4-dihydro-1H-isoquinoline-2-carbonitrile

4-methylsulfanyl-2-pyrrolidin-1-yl-3H-1,5-benzodiazepine

4-ethenyl-7-methoxychromen-2-one

4-piperidin-2-ylbutan-2-ol

4-hydroxy-N-(2-methoxyphenyl)-2-methylidene-4-phenylbutanamide

4-[[4-[(4-formamido-1-methylpyrrole-2-carbonyl)amino]-1-methylpyrrole-2-carbonyl]amino]-1-methylpyrrole-2-carboxylic acid

4-methyl-1,3-dioxa-4-azaspiro[5.5]undecane-2,5-dione

4-[3-[2-(trifluoromethyl)phenothiazin-10-yl]propyl]piperazine-2,6-dione

4,11-diphenyl-5,12-dioxa-8-thia-3,10-diazatricyclo[7.4.0.02,7]trideca-1(9),2(7),3,10-tetraene-6,13-dione

4,7-diphenylpyrazolo[5,1-c][1,2,4]triazine

4-(C,N-dimethylcarbonimidoyl)-3-hydroxy-2-phenyl-1H-pyrazol-5-one

4,4-dimethyl-2-(11-oxatricyclo[6.2.1.02,7]undeca-2(7),3,5,9-tetraen-3-yl)-5H-1,3-oxazole

4-[[3-(morpholin-4-ylmethyl)-6,11-dihydro-5H-benzo[b][1]benzazepin-8-yl]methyl]morpholine

4,8-dibromo-2,6-diethyl-[1,3]oxazolo[5,4-f][1,3]benzoxazole

4-(furan-2-yl)-2,2,3,3-tetramethoxycyclobutane-1,1-dicarbonitrile

4-amino-1-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-methoxypyrimidin-2-one

4-chloro-N-[(4-chlorophenyl)diazenyl]-N-prop-2-enylaniline

4-(2-hydroxyethoxymethyl)-1-oxido-1,2,4-benzotriazin-1-ium-3-one

4-methyl-2,6-di(piperidin-1-yl)pyridine-3-carbonitrile

4-[(4R,5R)-1-(4-chlorophenyl)-5-morpholin-4-yl-2-phenyl-4,5-dihydroimidazol-4-yl]morpholine

4-hydroxy-1-oxido-3-oxoquinoxalin-1-ium-2-carbonitrile

4-(1-Pyrrolidinyl)-1-β-D-ribofuranosyl-2(1H)-pyrimidinone

4-methyl-5,6-dihydro-2H-triazolo[4,5-d]pyrimidin-7-one

4-methyl-2-(pyridine-3-carbonylamino)pentanoic acid

4-(1H-benzimidazol-2-ylmethoxy)benzohydrazide

4-phenyl-[1,2,4]triazino[4,3-b]indazole

4-methyl-[1,2,4]triazino[4,3-b]indazole

4-morpholin-4-yl-8-phenyl-3,4,5,6-tetrahydrooxathiino[5,6-g][1,3]benzothiazole 2,2-dioxide

4-[4-(dimethylamino)phenyl]-4-phenyl-2,3-dihydrophthalazin-1-one

4-amino-2-[[2-chloroethyl(nitroso)carbamoyl]amino]-4-oxobutanoic acid

4-hydroxy-3,3-diphenylbenzo[f]quinoline-1-carbonitrile

4-amino-5-(4-nitrophenyl)-1,2-thiazole-3-carboxamide

4-(hydroxyamino)-5-nitroso-1,3-diphenylimidazole-2-thione

4-benzylidene-2-(2-bromophenyl)-1,3-oxazol-5-one

4-(10H-phenothiazin-3-ylmethyl)morpholine

4,8-bis(benzenesulfonyl)-2,6-dimethylideneoctan-1-ol

4-azatricyclo[4.3.1.13,8]undecan-3-ol

4-[[3-(4,6-diamino-2,2-dimethyl-1,3,5-triazin-1-yl)phenyl]methylamino]benzenesulfonamide;ethanesulfonic acid

4-(6-chloro-2,2-dimethyl-3a,5,6,6a-tetrahydrofuro[2,3-d][1,3]dioxol-5-yl)-1,3,2-dioxathiolane 2-oxide

4-ethyl-5-methyl-N'-[2-[(5-methyl-1H-imidazol-4-yl)methylsulfanyl]ethyl]-3-oxo-1H-pyrazole-2-carboximidamide

4-(Dichloromethyl)-2-pyridinecarboxamide

4-(phenanthro[9,10-d]imidazol-2-ylideneamino)naphthalen-1-ol

4-tert-butyl-N'-hydroxybenzenecarboximidamide

4-hydroxy-1,2,2,6,6-pentamethylpiperidine-4-carboxylic acid

4,7-phenanthroline-3-carbonitrile

4-(3-methyl-5-nitroimidazol-4-yl)sulfonylmorpholine

4-(2-prop-2-enylsulfanyl-1,3-benzothiazol-6-yl)-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione

4-ethylsulfanyl-2-methyl-5-sulfanylpyridazin-3-one

4-[2-(2-fluoroethylimino)hydrazinyl]benzonitrile

4,5-dichloro-2-methylsulfanyl-6-(trifluoromethyl)pyrimidine

4-nitropyrimidin-2-amine

4-chloro-5-diethoxyphosphinothioyloxy-2-methylpyridazine-3-thione