16H-1,24:6,9-Dietheno-11,15-metheno-2Hpyrido[ 2′,3′:17,18][1,11]dioxacycloeicosino[2,3,4- ij]isoquinolin-16-one,3,4,4a,5,18,19- hexahydro-12-hydroxy-21,22,26-trimethoxy- 4-methyl-,(4aS)-