2-{[(Tert-butoxy)carbonyl]amino}-3-(3-methoxy-1,2-thiazol-4-yl)propanoic acid

ethyl 2-amino-6-ethyl-4-(4-methoxyphenyl)-7-methyl-5-oxo-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

ethyl 2-amino-4-(2-fluorophenyl)-7-methyl-5-oxo-6-[(pyridin-2-yl)methyl]-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

methyl 2-amino-4-(4-methoxyphenyl)-7-methyl-5-oxo-6-[(oxolan-2-yl)methyl]-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

methyl 2-amino-4-(3,4-dimethoxyphenyl)-7-methyl-5-oxo-6-[(oxolan-2-yl)methyl]-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

methyl 2-amino-6-ethyl-7-methyl-5-oxo-4-[4-(trifluoromethyl)phenyl]-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

methyl 2-amino-7-methyl-5-oxo-6-[(pyridin-2-yl)methyl]-4-[4-(trifluoromethyl)phenyl]-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

methyl 2-amino-4-(3-chloro-4,5-dimethoxyphenyl)-6-ethyl-7-methyl-5-oxo-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

ethyl 2-amino-6-ethyl-4-(3-methoxyphenyl)-7-methyl-5-oxo-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

ethyl 2-amino-4-(2-fluorophenyl)-7-methyl-5-oxo-6-(2-phenylethyl)-4H,5H,6H-pyrano[3,2-c]pyridine-3-carboxylate

ethyl 2-amino-6-(2-methoxyethyl)-7-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]pyridine-3-carboxylate