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Chromatograms and mass spectra for the patchouli oils under study: Avicenna EO (a) and Tisserand EO (b). A—major peak for mass 205.2 m/z, B—major peak for mass 219.2 m/z, C—major peak for mass 225.2 m/z. *—potential position of nonmodified patchouli alcohol—patchoulol (222.4 m/z).
