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. Author manuscript; available in PMC: 2012 Sep 10.

Published in final edited form as: J Pharm Biomed Anal. 2010 Jan 15;52(2):173–180. doi: 10.1016/j.jpba.2010.01.010

Table 4.

Mass spectra of compounds (1–8) identified using LC–ESI-MS with positive and negative scan mode.

Analyte	Mass spectra negative ion (m/z)	Mass spectra positive ion (m/z)
1	739.1705 [M−H]⁻	741.1887 [M+H]⁺, 763.1739 [M+Na]⁺
2	739.1725 [M−H]⁻	741.1941 [M+H]⁺, 763.1749 [M+Na]⁺
3	723.1745 [M−H]⁻	725.1918 [M+H]⁺, 747.1773 [M+Na]⁺
4	723.1784 [M−H]⁻	725.1961 [M+H]⁺, 747.1791 [M+Na]⁺
5	651.4108 [M−H]⁻	653.4257 [M+H]⁺, 675.4117 [M+Na]⁺
6	649.3952 [M−H]⁻	651.4134 [M+H]⁺, 673.3968 [M+Na]⁺
7	651.4108 [M−H]⁻	653.4267 [M+H]⁺, 675.4112 [M+Na]⁺
8	633.4003 [M−H]⁻	635.4189 [M+H]⁺, 657.3998 [M+Na]⁺