102516-53-0 16H-1,24:6,9-Dietheno-11,15-metheno-5H-pyrido(2',3':17,18)(1,11)dioxacycloeicosino(2,3,4-ij)isoquinolin-5-one, 16a,17,18,19-tetrahydro-12,21,22,26-tetramethoxy-17-methyl-, (+)- Oxofangchirine