左炔诺孕酮EP杂质I 货号:L005009 英文名:Levonorgestrel EP Impurity I 同义词:(8S,9S,10S,13S,14S,17R)-13-ethyl-17-ethynyl-10,17-dihydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one CAS号:21508-50-9 分子式:C21H28O3 分子量:328.45 询价订购