preferred_name: 5-(ACETYLOXY)-6,6A,7,13,14,16-HEXAHYDRO-8-HYDROXY-9-METHOXY-4,10,23-TRIMETHYL-19,20-DIOXO-6,16-(EPITHIOPROPANOXYMETHANO)-7,13-IMINO-12H-1,3-DIOXOLO(7,8)ISOQUINO(3,2-B)(3)BENZAZOCINE-14-CARBONITRILE ACETATE, (6R,6AR,7R,13S,14R,16R)-