Cryptotanshinone35825-57-1100 % similar Dihydrotanshinone I87205-99-051 % similar Tanshinone IIA568-72-942 % similar Przewaquinone A76843-23-740 % similar Sodium tanshinone IIA sulfonate69659-80-936 % similar 8,9-Dihydro-4,8-dimethylphenanthro(3,2-b)furan-7,11-dione20958-18-334 % similar