英文别名Venlafaxine Cyclic Impurity H; 5-(4-methoxyphenyl)-3-methyl-3-aza-1-oxaspiro(5.5)-undecane; Venlafaxine Cyclic Impurity; spiro venlafaxine; Venlafaxine EP Impurity E; 1-Oxa-3-azaspiro[5.5]undecane, 5-(4-methoxyphenyl)-3-methyl-; (5RS)-5-(4-Methoxyphenyl)-3-methyl-1-oxa-3-azaspiro[5.5]undecane 
