左炔诺孕酮杂质25 货号:L005025 英文名:Levonorgestrel Impurity 25 同义词:(5S,8R,9R,10S,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxytetradecahydro-1H-cyclopenta[a]phenanthren-3(2H)-one CAS号:N/A 分子式:C21H30O2 分子量:314.46 询价订购