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Figure 5 | Virology Journal

Figure 5

From: Identification of light-independent inhibition of human immunodeficiency virus-1 infection through bioguided fractionation of Hypericum perforatum

Figure 5

Mass spectra of trimethylsiloxyl esters of peaksin H. perforatum extracts identified as 3-hydroxy lauric acid (a), 3-hydroxy palmitic acid (b), and 3-hydroxy myristic acid (c). The following ions indicate how to interpret these spectra: 1) the molecular ion (M+-1) is marked with an asterisk; 2) the abundant fragment at m/z = (M+-1)-15 is due to the fragmentation of the omega-methyl group; 3) the fragment ion at m/z = (M+-1)-57 is due to the left-most fragmentation indicated in each structure; and 4) the common fragment ion at m/z = 233 is due to the right-most fragmentation indicated in each structure.

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