Dihydrotanshinone

Dihydroisotanshinone I

8,9-Dihydro-4,8-dimethylphenanthro[3,2-b]furan-7,11-dione

4,8-Dimethyl-8,9-dihydrophenanthro[3,2-b]furan-7,11-dione

Phenanthro(3,2-B)furan-7,11-dione, 8,9-dihydro-4,8-dimethyl-