左炔诺孕酮EP杂质A 货号:L005001 英文名:Levonorgestrel EP Impurity A 同义词:(9R,10R,13S,17R)-13-ethyl-17-ethynyl-17-hydroxy-6,7,9,10,11,12,13,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3(2H)-one CAS号:1260525-53-8 分子式:C21H26O2 分子量:310.43 询价订购