tert-butyl (3aR,7aS)-5-(6-nitrothieno[3,2-b]pyridin-7-yl)-2-oxohexahydrooxazolo[4,5-c]pyridine-3(2H)-carboxylate

tert-butyl (3aR,7aS)-5-(6-aminothieno[3,2-b]pyridin-7-yl)-2-oxohexahydro[1,3]oxazolo[4,5-c]pyridine-3(2H)-carboxylate