特非那定EP杂质E 货号:T084005 英文名:Tefenadine EP Impurity E 同义词:(R)-1-(4-(4-(tert-butyl)phenyl)-4-hydroxybutyl)piperidine-4-carboxylic acid CAS号:N/A 分子式:C20H31NO3 分子量:333.47 询价订购