氯沙坦钾杂质A 货号:L006001 英文名:Losartan potassium impurity A 同义词:2-butyl-4-chloro-1H-imidazole-5-carbaldehyde CAS号:83857-96-9 分子式:C8H11ClN2O 分子量:186.64 询价订购