维A酸EP杂质A 货号:T093001 英文名:Tretinoin EP Impurity A 同义词:(2Z,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenoic acid CAS号:4759-48-2 分子式:C20H28O2 分子量:300.44 询价订购