托吡卡胺EP杂质B 货号:T054002 英文名:Tropicamide EP Impurity B 同义词:N-ethyl-2-phenyl-N-(pyridin-4-ylmethyl)acrylamide CAS号:57322-50-6 分子式:C17H18N2O 分子量:266.34 询价订购