質INHC18H21NO267.37 4-二苯甲基氧基哌啶雜質ⅡH3CH3 C19H29NO2303.45 4-(4羥基哌啶-1-基)-1-(4-叔丁基苯基)-1-丁酮雜質Ⅲ C26H22334.46 1,1,2,2-四苯乙烷