苄基青霉素EP杂质E 货号:B066006 英文名:Benzylpenicillin EP Impurity E 同义词:(4S)-2-(carboxy(2-phenylacetamido)methyl)-5,5-dimethylthiazolidine-4-carboxylic acid CAS号:N/A 分子式:C16H20N2O5S 分子量:352.41 询价订购