rotenonone

(2R)-1,2-Dihydro-2α-isopropenyl-8,9-dimethoxy-[1]benzopyrano[3,4-b]furo[2,3-h][1]benzopyran-6,12-dione

(R)-1,2-Dihydro-8,9-dimethoxy-2-(1-methylethenyl)[1]benzopyrano[3,4-b]furo[2,3-h][1]benzopyran-6,12-dione