Synonyms: 24-Nor-13,17-secochola-13(18),16,20(22)-triene-16-carboxylicacid, 14,17-epoxy-22-hydroxy-4,4,8-trimethyl-3-oxo-, d-lactone, (5a)-;Spiro[4H-furo[3,2-c]pyran-2(3H),1'-phenanthrene]-4,7'(2'H,4'bH)-dione,3',4',4'a,5',6',8',8'a,9',10',10'a-decahydro-4'b,6,7,8',8',10'a-hexamethyl-2'-methylene-,(1'S,4'aR,4'bR,8'aR,10'aR)- (9CI); (+)-Lygodinolide; Lygodinolide;Spiro[4H-furo[3,2-c]pyran-2(3H),1'-phenanthrene]-4,7'(2'H,4'bH)-dione,3',4',4'a,5',6',8',8'a,9',10',10'a-decahydro-4'b,6,7,8',8',10'a-hexamethyl-2'-methylene-,[1S-(1'a,4'aa,4'bb,8'aa,10'ab)]-