| abstract |
The invention provides a compound of formula (I), a pharmaceutical composition thereof, a method of preparing a medicament for the treatment of a cancer, and a method of treating cancers. The invention exhibits merits against cancers such as significantly higher potency and effectiveness over a broader range of cancers. In formula (I), Ra is a benzyl group with alkyl and/or alkoxy; Rb is selected from H and alkyl groups; Rf is an alkyl; and R3 is selected from a (Formula) substituted phenyl, a heterocyclic group, and, Formula, wherein Rc is selected from a fused ring, fused rings, and any bivalent cyclic group. Formula (I) |