(E) -1- (8--benzopyran-yl) -2-propen-1-one and its analogs and their use

The present invention belongs to the field of pharmaceutical technology, in particular, it relates to (E) -1- [8- (5- methoxy-2,2-dimethyl--2H- chromen-yl)] - 3- (4-methoxy ) -2-propen-1-one and its derivatives as well as their preparation and use. The present invention provides the (E) -1- [8- (5- methoxy-2,2-dimethyl--2H- chromen-yl)] - 3- (4-methoxyphenyl) -2 - propen-1-one and its analogs, such as structural formula I, these compounds inhibit tumor efficacy.