分类:Pharmaceuticals, Intermediates & Fine Chemicals, Steroids, CAS:72-33-3 分子式:C21H26O2 分子量:310.43 物理性质:White Solid 应用说明:Orally active estrogenic steroid. It was the estrogen used in many of the first oral contraceptives. 别名:(17a)-3-Methoxy-19-norpregna-1,3,5(1