Ethyl 4-(4-chlorophenyl)-3-oxo-1-thia-4,8-diazaspiro[4.5]decane-8-carboxylate

ETHYL 4-(5-CHLORO-2-METHOXYPHENYLUREIDO)BENZOATE

ETHYL 4-(PHENYLAZO)PHENYL CARBONATE

ETHYL 4-AMINO-2,6-DIOXO-1,2,5,6-TETRAHYDRO-3-PYRIDINECARBOXYLATE

Ethyl 4-bromo-3-hydroxy-5-methylbenzoate

ethyl 4-chloro-6-fluoroquinoline-3-carboxylate

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

Ethyl 4-hydroxy-6-nitroquinoline-3-carboxylate

ETHYL 4-METHOXYOXANILATE

Ethyl 4-methyl-3-(methylamino)cyclohexanecarboxylate

ethyl 4-oxo-2,2-diphenylpentanoate

ETHYL 4-PHENYL-2-({2,2,2-TRICHLORO-1-[(3-METHYLBENZOYL)AMINO]ETHYL}AMINO)-3-THIOPHENECARBOXYLATE

ETHYL 4,5-DIMETHYL-2-({[3-OXO-6-(TRIFLUOROMETHYL)-3,4-DIHYDRO-2H-1,4-BENZOTHIAZIN-2-YL]ACETYL}AMINO)-3-THIOPHENECARBOXYLATE

Ethyl 4H-thieno[3,2-c]chromene-2-carboxylate

ETHYL 5-{4-[(CHLOROACETYL)OXY]-7-METHOXY-2-OXO-6-PROPYL-2H-CHROMEN-3-YL}-2-FUROATE