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 Ethyl 4-oxo-3,4-dihydroquinazoline-6-carboxylate ethyl 4-oxo-3,4-dihydro-2-quinazolinecarboxylate ethyl 4-oxo-3-(propylthio)-4,5,6,7-tetrahydrobenzo[c]thiophene-1-carboxylate Ethyl 4-Nitrophenylacetate
 Ethyl 4-nitrocinnamate Ethyl 4-nitrobenzoylacetate Ethyl 4-nitrobenzoate ethyl 4-nitro-1H-pyrrole-2-carboxylate
 Ethyl 4-methylvalerate Ethyl 4-methylthiazole-2-carboxylate Ethyl 4-methylpyrrolidine-3-carboxylate Ethyl 4-Methylpiperidine-4-carboxylate Hydrochloride
 Ethyl 4-methylpiperidine-4-carboxylate Ethyl 4-methyloxazole-2-carboxylate Ethyl 4-methylcinnamate Ethyl 4-methylbenzoate
 Ethyl 4-methylamino-3-nitrobenzoate ethyl 4-methyl-7-nitro-1H-indole-2-carboxylate Ethyl 4-methyl-5-imidazolecarboxylate Ethyl 4-methyl-4-pentenoate
 Ethyl 4-methyl-2-phenyl-1,3-thiazole-5-carboxylate ethyl 4-methyl-2-phenyl-1,3-oxazole-5-carboxylate Ethyl 4-methyl-2-cyclohexanone-1-carboxylate ethyl 4-methyl-1H-pyrazole-5-carboxylate
 ethyl 4-methyl-1,3-oxazole-5-carboxylate Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate Ethyl 4-Methoxycinnamate Ethyl 4-methoxybenzoylformate
 Ethyl 4-methoxy-1H-indazole-3-carboxylate ethyl 4-methanesulfonamidobenzoate Ethyl 4-isopropyl-2-thiazolecarboxylate Ethyl 4-iodobutyrate
 Ethyl 4-Iodobenzoate ethyl 4-hydroxythieno[2,3-b]pyridine-5-carboxylate ethyl 4-hydroxyquinoline-2-carboxylate Ethyl 4-hydroxyphenylacetate
 Ethyl 4-hydroxynicotinate Ethyl 4-hydroxynaphthalene-2-carboxylate Ethyl 4-Hydroxymandelate Ethyl 4-hydroxycyclohexanecarboxylate
 Ethyl 4-hydroxybenzoate Ethyl 4-hydroxy-8-trifluoromethylquinoline-3-carboxylate Ethyl 4-hydroxy-8-methoxyquinoline-3-carboxylate ethyl 4-hydroxy-7-methyl-2-oxo-1-propyl-1,2-dihydro-1,8-naphthyridine-3-carboxylate
 ethyl 4-hydroxy-7-methyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate Ethyl 4-hydroxy-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate Ethyl 4-hydroxy-6-methyl-2-oxo-3-cyclohexene-1-carboxylate Ethyl 4-hydroxy-6-methoxyquinoline-3-carboxylate
 ethyl 4-hydroxy-6,8-dimethylquinoline-3-carboxylate Ethyl 4-hydroxy-6-(trifluoromethyl)quinoline-3-carboxylate Ethyl 4-hydroxy-3-nitrobenzoate Ethyl 4-hydroxy-3-methoxybenzoate
 ethyl 4-hydroxy-3-iodobenzoate ethyl 4-hydroxy-3-(methylthio)-4,5,6,7-tetrahydrobenzo[c]thiophene-1-carboxylate ethyl 4-hydroxy-2-phenylpyrimidine-5-carboxylate ethyl 4-hydroxy-2-oxo-1-phenyl-1,2-dihydro-1,8-naphthyridine-3-carboxylate
 Ethyl 4-hydroxy-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate Ethyl 4-hydroxy-2-methylthiopyrimidine-5-carboxylate ethyl 4-hydroxy-2-methylquinoline-6-carboxylate ethyl 4-hydroxy-2-methylpyrimidine-5-carboxylate
 Ethyl 4-hydroxy-2-methylaminothiazole-5-carboxylate Ethyl 4-hydroxy-2-methyl-1,1-dioxo-2H-1,2-benzothiazine-3-carboxylate ethyl 4-hydroxy-2-[4-(trifluoromethyl)phenyl]-1,3-thiazole-5-carboxylate ethyl 4-hydroxy-2-[3-(trifluoromethyl)phenyl]-1,3-thiazole-5-carboxylate
 Ethyl 4-hydroxy-2-(trifluoromethyl)pyrimidine-5-carboxylate ethyl 4-hydroxy-2-(methylthio)pyrimidine-5-carboxylate Ethyl 4-hydroxy-2-(4-methylphenyl)-1,3-thiazole-5-carboxylate ethyl 4-hydroxy-1-methyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate
 ethyl 4-hydroxy-1,7-dimethyl-2-oxo-1,2-dihydro-1,8-naphthyridine-3-carboxylate ethyl 4H-thieno[2,3-d]pyrrole-5-carboxylate ethyl 4-formyl-3,5-dimethyl-1H-pyrrole-2-carboxylate ethyl 4-formyl-2,5-dimethyl-1-phenyl-1H-pyrrole-3-carboxylate
 Ethyl 4-formyl-2,5-dimethyl-1-(2-thienylmethyl)-1H-pyrrole-3-carboxylate Ethyl 4-formyl-1H-pyrrole-2-carboxylate Ethyl 4-Fluoropiperidine-4-carboxylate Hydrochloride Ethyl 4-Fluoropiperidine-4-carboxylate
 Ethyl 4-fluorobenzoylacetate Ethyl 4-fluorobenzoate ethyl 4-fluorobenzo[b]thiophene-2-carboxylate Ethyl 4-fluoro-3-nitrobenzoate
 Ethyl 4-Fluoro-2-nitro-5-(1-pyrazolyl)benzoate ethyl 4-fluoro-2-methyl-1H-indole-3-carboxylate Ethyl 4-etoxybenzoate Ethyl 4-Ethynylbenzoate
 ethyl 4-ethyl-3-iodobenzoate Ethyl 4-ethyl-3,5-dimethyl-1H-pyrrole-2-carboxylate ethyl 4-ethoxy-6-methylpyridine-3-carboxylate ethyl 4-ethoxy-3-iodobenzoate
 Ethyl 4-ethoxy-2-hydroxybenzoate Ethyl 4-dimethylaminobenzoate Ethyl 4-dimethylamino-2-oxo-3-butenoate Ethyl 4-Cyclopropyl-1,3-thiazole-2-carboxylate
 Ethyl 4-Cyanopiperidine-1-carboxylate Ethyl 4-cyanophenylacetate Ethyl 4-cyanobenzoate ethyl 4-cyano-5-(methylsulfanyl)thiophene-2-carboxylate
 Ethyl 4-chlorothieno[3,2-d]pyrimidine-6-carboxylate ETHYL 4-CHLOROTHIENO[2,3-B]PYRIDINE-5-CARBOXYLATE Ethyl 4-chlorothiazole-5-carboxylate ethyl 4-chloroquinoline-3-carboxylate
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