(6aS,7R,13S,14S,16R)-5-Acetoxy-14-cyano-8-hydroxy-9-methoxy-4,10,17-trimethyl-16-(N-phthalimidomethyl)-6a,7,12,13,14,16-hexahydro-6H-7,13-imino-1,3-dioxolo[4',5':7,8]isoquino[3,2-b][3]benzazocine