Abstract: A Study on Mass Spectrometry of Two New Diterpenoid AlkaloidLi Haiquan; Din Lishen; Zhao Fanzhi; Zai Jianjun;Chen Nenyut, Chen Yaozu (National Laboratory of Applied Organic Chemistry,Lanzhou University,Lanzhou 730000,China )Received 1993-05-07 Abstract:Mass spectra of two new diterpenoid alkaloid,compounds 1 and 2,are studied using EI mass spectrometry, high resolution mass spetrometry and CA mass spectrometry.The significant fragments from the samples are also studied in this paper.Keywords:two diterpenoid alkaloid,EI mass spectrometry,significant fragments.