1. 乙炔雌二醇EP杂质I(6,7-二氢乙炔雌二醇)

乙炔雌二醇EP杂质I(6,7-二氢乙炔雌二醇)

Ethinylestradiol EP Impurity I (6,7-Didehydro Ethynyl Estradiol)