【摘要】 本文通过高、低分辨质谱和亚稳跃迁实验解析了在C—7、C—9位有取代原子(团)的双吡咯烷类化合物(主要是大环双内酯系列)所存在的质谱特性,并论证了这种特征与其结构—N核上的双键数与C—7、C—9位的取代原子(团)——之间的关系,提出:此特征可以作为判别这类化合物是否可能存在的依据.更多还原

【Abstract】 By using high and low resolution mass spectrometric determination as well as metastable technique, it has been found that in pyrrolizidine alkaloids(mostly macrocyclic dilactones)there exists a definite pathway of fragmentation, which leads to the formation of a specific ion series with the conjugated m/e 117 as the precursor ion. The relation between the abundance of these ions and the structure of the molecules has been investigated. This specific ion series can be used as a criterion of the presence of the pyrrolizidine alkaloids.更多还原