特非那定EP杂质J 货号:T084010 英文名:Tefenadine EP Impurity J 同义词:(R)-ethyl 1-(4-(4-(tert-butyl)phenyl)-4-hydroxybutyl)piperidine-4-carboxylate CAS号:N/A 分子式:C22H35NO3 分子量:361.52 询价订购