140163-63-9

Spiro[2,6-dioxabicyclo[3.1.0]hexane-4,6'-[1H,6H]phenaleno[1,9a-c]furan]-3,3',7'(5'H,8'H)-trione,10'-(acetyloxy)-5'a,8'a,9',10',11',11'b-hexahydro-5'-hydroxy-8'a,9'-dimethyl-,[5'S-[5'a,5'aa,6'b(1S*,5R*),8'aa,9'a,10'a,11'aR*,11'bb]]-