英文别名rac-Lipoic Acid Impurity 3 (S-Oxide); Lipoic acid impurity N1; Lipoic Acid Impurity 5; Thioctic Acid Impurity 2; Thioctic Acid Impurity 1; Rac-Lipoic Acid Impurity F; Thioctic acid Impurity 4; Lipoic acid impurity 1; Lipoic Acid Impurity 4; rac-Lipoic Acid Impurity 4 (S-Oxide)