维A酸EP杂质B 货号:T093002 英文名:Tretinoin EP Impurity B 同义词:(2Z,4E,6Z,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenoic acid CAS号:5352-74-9 分子式:C20H28O2 分子量:300.44 询价订购