左炔诺孕酮EP杂质W 货号:L005023 英文名:Levonorgestrel EP Impurity W 同义词:(13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-4,11,12,13,14,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-3(2H)-one CAS号:155683-59-3 分子式:C21H24O2 分子量:308.41 询价订购