2,6-Epoxy-2H-naphthaceno(1,2-b)oxocin-9,16-dione, 3,4,5,6,11,12,13,14-octahydro-3,5,8,10,13-pentahydroxy-11-methoxy-6,13-dimethyl-4-(methylamino)-, (2R-(2alpha,3beta,4alpha,5beta,6alpha,11alpha,13alpha))- 81445-91-2 N-Demethylmenogaril