methyl 7-oxo-4,5-dihydro-1H,3H-spiro[[1,3]dioxolo[4,5-j]pyrrolo[3,2,1-de]phenanthridine-2,2'-[1,3]dithiolane]-3a(7H)-carboxylate

2,3,4-trihydroxy-[1,3]dioxolo[4,5-j]phenanthridin-6(5H)-one