153982-61-7

2H-Pyrano[4,3,2-kl]xanthene-8,11-dione,9-[2-(formyloxy)-1-methylpropyl]-3,11b-dihydro-5-hydroxy-2,3,4,10-tetramethyl-,[2R-[2a,3b,9(1S*,2R*),11bb]]-