左炔诺孕酮杂质34 货号:L005034 英文名:Levonorgestrel Impurity 34 同义词:(5R,8R,9S,10R,13S,14S)-13-ethyl-5-methoxydodecahydro-1H-cyclopenta[a]phenanthrene-3,17(2H,4H)-dione CAS号:2762739-32-0 分子式:C20H30O3 分子量:318.45 询价订购