总结和归属了(1H)＿3,4＿二氢吡咯［2,1＿c］［1,4］嗪＿1＿酮及其6个苯甲酰基衍生物和两个苯乙酰基衍生物在电子轰击电离质谱(EIMS)中的主要裂解方式和特征,指明了主要碎片离子的来源和结构。这8个芳酰基衍生物质谱图中的主要碎片峰均来自α＿裂解和脱中性小分子碎片的重排裂解,由其产生的m／z164、m／z120和m／z92离子是该类化合物共同的特征离子;二氢吡咯嗪酮苯甲酰基衍生物和苯乙酰基衍生物的基峰都为m／z164。 (1H) _3,4_ dihydropyrrole [2,1_c] [1,4] pyrazine _1_ ketone and its six benzoyl derivatives and two phenylacetyl derivatives in electron impact ionization mass spectrometry ( EIMS), indicating the source and structure of the major fragment ions. The major fragment peaks in the 8 aroyl derivative spectra are derived from rearrangement cleavage of α-cleaved and de-neutralized small molecule fragments from which the m / z 164, m / z 120 and m / z 92 ions are produced Common characteristic ions; the base peaks for the dihydropyrroloxanthinone benzoyl derivative and the phenylacetyl derivative are both m / z 164.