Abstract

CASTRO MANDUJANO, Olivio Nino et al. Isolation and structural elucidation of a new depside of lichen Everniopsis trulla. Rev. Soc. Quím. Perú [online]. 2021, vol.87, n.2, pp.97-106. ISSN 1810-634X.  http://dx.doi.org/10.37761/rsqp.v87i2.340.

In this research, a new depside of the lichen Everniopsis trulla has been isolated. The extraction was carried out to 400 g of dry sample and ground with ethanol for 3 repetitions, then, it was fractionated by applying column chromatography with the CHCl3-MeOH system and purified by recrystallization with MeOH-Acetone (1: 1); Finally, white crystals in the form of needles (solid C) with a melting point of 198 ° C were obtained, whose structure was elucidated based on spectroscopic data (UV-Visible, IR, NMR-H1, NMR-C13, mass spectrometry and single crystal X-ray diffraction). According to the Science Finder databases, it is a new depside, called trullarin, and it is observed that molecular packing is influenced by both intramolecular and intermolecular forces. Intermolecular hydrogen bonds of O-H O type binds neighboring molecules forming dimers.

Keywords : Crystal structure; Depside; Everniopsis trulla; Trullarin.

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