1,3-Dioxolo[i][1,3]dioxolo[4,5]benzo[1,2-c]phenanthridine 522-30-5 NSC143762 Norsanguinarine Sanguinarine, 13-demethyl- [1,3]Benzodioxolo[5,6-c]-1,3-dioxolo[4,5-i]phenanthridine