GC analysis of fatty acid extracts prepared from aseptically grown seedlings (a), and dried, field-grown leaves (b) of H. perforatum. For comparison (c) shows the GC analysis of the original extract from which subfraction E4.7 was generated (see Figure 4). Fatty-acid peaks whose chemical identity was established by comparing their retention times and mass spectra to authentic standards are: palmitic acid (1), 3-hydroxy myristic acid (2), palmitelaidic acid (3), 3-hydroxy palmitic acid (4).
Maury et al. Virology Journal 2009 6:101 doi:10.1186/1743-422X-6-101