左炔孕酮杂质 Norgestrel impurity
ZQT-X (8R,9S,13S,14S)-13-ethyl-3-methoxy6,7,8,9,11,12,13,14,15,16-decahydro17H-cyclopenta[a]phenanthren-17-one 848-04-4ACA-160926-0020 18-Methyl Ethynyl Estradiol 14012-72-7