((1aS,1bR,2S,7aS)-1-Bromo-1b,4-dimethoxy-5-methyl-3,6-dioxo-1a,1b,2,3,6,6b,7,7a-octahydro-1H-benzo[4,5]pentaleno[1,2-b]azirin-2-yl)methyl carbamate

((1aS,1bR,2S,7aS)-1-Bromo-1b,4-dimethoxy-5-methyl-3,6-dioxo-1a,1b,2,3,6,6b,7,7a-octahydro-1H-benzo[4,5]pentaleno[1,2-b]azirin-2-yl)methyl carbamate