propyl 2-amino-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate

4-isopropyl 2-methyl 5-amino-3-methylthiophene-2,4-dicarboxylate

propyl 2-amino-6-ethyl-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate

isopropyl 2-amino-4-methyl-5-{[(2-methylphenyl)amino]carbonyl}thiophene-3-carboxylate

ethyl 2-amino-4-(4-butylphenyl)thiophene-3-carboxylate

propyl 2-amino-4-(3,4-dimethylphenyl)thiophene-3-carboxylate

propyl 2-amino-4-(1,1'-biphenyl-4-yl)thiophene-3-carboxylate

isopropyl 2-amino-4-(2,4-dimethylphenyl)thiophene-3-carboxylate

isopropyl 2-amino-4-(4-chlorophenyl)thiophene-3-carboxylate

isopropyl 2-amino-4-(2,4-dichlorophenyl)thiophene-3-carboxylate