The present invention provides compounds which are useful, e.g., as reference markers for analyzing the purity of cisatracurium and salts thereof, a test method for determining the said purity and processes for preparing reference markers.
                            本发明提供了化合物,例如,作为参考标记物用于分析顺-
阿曲库铵及其盐的纯度,一种确定所述纯度的测试方法以及制备参考标记物的过程。