Synonyms: [1]Benzopyrano[3,4-b]furo[2,3-h][1]benzopyran-6(6aH)-one,1,2,12,12a-tetrahydro-2-(1-hydroxy-1-methylethyl)-8,9-dimethoxy-,(2R,6aS,12aS)-(-)- (8CI);[1]Benzopyrano[3,4-b]furo[2,3-h][1]benzopyran-6(6aH)-one,1,2,12,12a-tetrahydro-2-(1-hydroxy-1-methylethyl)-8,9-dimethoxy-, [2R-(2a,6aa,12aa)]-; (-)-Dalpanol; 2'-Hydroxy-1',2'-dihydrorotenone; Dalpanol