Source:http://linkedlifedata.com/resource/umls/id/C0025506
MSH: The 3-methyl ether of ETHINYL ESTRADIOL. It must be demethylated to be biologically active. It is used as the estrogen component of many combination ORAL CONTRACEPTIVES.,NCI: A semisynthetic estrogen. Metabolized by the liver to ethynyl estradiol, mestranol serves as the estrogen component in several combination oral contraceptives. (NCI04)