1 the oestrogenic and antioestrogenic activities of tamoxifen and monohydroxytamoxifen have been compared with those of para-methoxy , -methyl , -fluoro , and -chloro tamoxifen in the 3 day immature rat uterine weight test.2 the oestrogenic activity of mestranol , a steroid with low oestrogen receptor binding affinity which is believed to be demethylated to ethinyl oestradiol before exerting its effects , was less potent than ethinyl oestradiol when assayed in the 3 day immature rat uterine weight test .
C0025506
mestranol
C0015011
ethinyl oestradiol