(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-5-methyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepine-8-carboxylic acid 1g

(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-5-methyl-4-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]oxazepine-8-carboxylic acid 1g