methyl (3aR,3bS,5aS,12aR,12bR,13aR)-2,2-dimethyl-11-oxo-3a,3b,5a,11,12,12a,12b,13a-octahydro-5H,6H-[1,3]dioxolo[4'',5'':4',5']furo[2',3':5,6]pyrano[4,3-e][1,2,3]triazolo[1,5-a][1,4]diazepine-10-carboxylate