abstract |
Derived from 15,16-methylene-17- (1'-propenyl) -17-3'-oxidoestra-4-en-3-one, with the general chemical formula I: in which Z is selected from the set comprising oxygen, two hydrogen atoms, NOR 'and NNHSO2R', where R 'is hydrogen, C1-C10 alkyl, aryl or C7-C20 aralkyl, R4 is selected from the group comprising hydrogen, fluoro, chloro or bromo. |