1-(Methoxycarbonyl)-8alpha-formyl-1aalpha,2,3,8,9,9aalpha-hexahydro-7,9-dimethoxy-3alpha,9alpha-epoxy-1H-azirino[2,3-c][1]benzazocine-5-carboxylic acid methyl ester

1-(Methoxycarbonyl)-8alpha-formyl-1aalpha,2,3,8,9,9aalpha-hexahydro-7,9-dimethoxy-3alpha,9alpha-epoxy-1H-azirino[2,3-c][1]benzazocine-5-carboxylic acid methyl ester