(3R,6R,8aS)-6-tert-Butoxycarbonylamino-5-oxo-hexahydro-thiazolo[3,2-a]pyridine-3-carboxylic acid

5H-thiazolo[3,2-a]pyridine-3-carboxamide, N-{4-[(bis-{[(1,1-dimethylethoxy)carbonyl]amino}methylene)amino]butyl}-6-{[(1,1-dimethylethoxy)carbonyl]amino}-hexahydro-5-oxo-, (3R-(3α,6β,8aα))-(9Cl)