ETHYL 4-(2,3-DIMETHOXYPHENYL)-2,7,7-TRIMETHYL-5-OXO-1,4,5,6,7,8-HEXAHYDRO-3-QUINOLINECARBOXYLATE

ETHYL 4-(3-(4-(N-METHYLACETAMIDO)PHENYL)UREIDO)BENZOATE

ETHYL 4-(3,4-DICHLOROBENZAMIDO)-BENZOATE

Ethyl 4-(4-chlorophenyl)-2-phenylthiazole-5-carboxylate

ETHYL 4-(5-BUTYL-2-THIENYL)-2,7,7-TRIMETHYL-5-OXO-1,4,5,6,7,8-HEXAHYDRO-3-QUINOLINECARBOXYLATE

ETHYL 4-(TERT-BUTOXYCARBONYL)-2-(ETHOXYCARBONYL)-5-METHYL-3-PYRROLEPROPIONATE

Ethyl 4-aminotetrahydro-2H-pyran-4-carboxylate

ETHYL 4-CHLORO-2-(ETHYLTHIO)-5-PYRIMIDINECARBOXYLATE

ethyl 4-dibenzo[b,d]furan-2-yl-4-oxobutanoate

Ethyl 4-hydroxypyrrolo[1,2-f][1,2,4] triazine-6-carboxylate

Ethyl 4-methyl-2-(2-pyrazinyl)-thiazole-5-carboxylate

Ethyl 4-oxo-1,4,5,6,7,8-hexahydrocyclohepta[b]pyrrole-3-carboxylate

ETHYL 4-SULFO-1-NAPHTHYL CARBONATE

ethyl 4,5,6,7-tetrahydro-1H-indole-2-carboxylate

ETHYL 5-[(3-CHLOROANILINO)CARBONYL]-4-METHYL-2-[(3,4,5-TRIMETHOXYBENZOYL)AMINO]-3-THIOPHENECARBOXYLATE