左西替利嗪杂质2 货号:L083002 英文名:Levocetirizine Impurity 2 同义词:(S)-2-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethanol CAS号:705289-62-9 分子式:C19H23ClN2O 分子量:330.85 询价订购