2H-1,24:12,15-Dietheno-6,10-metheno-16H-pyrido(2',3':17,18)(1,10)dioxacycloeicosino(2,3,4-ij)isoquinoline, 3,5,18,19-tetrahydro-9,21,22,26-tetramethoxy- 5692-04-6 Stebisimine