左炔诺孕酮杂质37 货号:L005037 英文名:Levonorgestrel Impurity 37 同义词:(5R,8R,9S,10R,13S,14S)-13-ethyl-5-methoxytetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17(2H)-one CAS号:2762739-33-1 分子式:C22H34O4 分子量:362.50 询价订购