(1)Benzopyrano(3,4-b)furo(2,3-h)(1)benzopyran-6(6aH)-one, 1,2,12,12a-tetrahydro-6a-hydroxy-2-(1-hydroxy-1-methylethyl)-8,9-dimethoxy-, (2R-(2alpha,6aalpha,12aalpha))- 1',2'-Dihydro-2',6-dihydroxyrotenone 85042-77-9 DH-2,6-OH-rotenone