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Inositol was added to the sample, which was then freeze dried. The dried samples were heated in 3 M methanolic HCl for 18 h at 80 oC. After cooling and drying under nitrogen, the sample was treated with MeOH and dried several more times, each after addition of about 500 ¦ÌL fresh MeOH. The samples were then mixed with MeOH, pyridine, and acetic anhydride and left to stand for 30 minutes. These solvents were dried down fully and the sample was derivatized with Tri-Sil (Pierce) at 80 oC for 30 min. After barely drying the samples, hexane was added, and the samples were centrifuged and the supernatant was dried down for analysis.
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