Synonyms: 1,5-Methano-1H,7H,11H-furo[3,4-g]pyrano[3,2-b]xanthene-7,15-dione,3,3a,4,5-tetrahydro-8-hydroxy-1-(4-hydroxy-3-methyl-2-butenyl)-3,3,11,11-tetramethyl-13-(3-methyl-2-butenyl)-,[1R-[1a,1(E),3ab,5a,14aS*]]-; 1,5-Methano-1H,7H,11H-furo[3,4-g]pyrano[3,2-b]xanthene-7,15-dione,3,3a,4,5-tetrahydro-8-hydroxy-1-[(2E)-4-hydroxy-3-methyl-2-butenyl]-3,3,11,11-tetramethyl-13-(3-methyl-2-butenyl)-,(1R,3aS,5S,14aS)- (9CI); Isomorellinol