Compound 19

1-((6aS*,7S*,12aR*)-2,4,9,11-tetrahydroxy-1,3,6a,8,10-pentamethyl-5,6,6a,7,12,12a-hexahydrobenzo[b]phenanthridin-7-yl)ethan-1-one

From: Use of a biosynthetic intermediate to explore the chemical diversity of pseudo-natural fungal polyketides