Phenolic compounds from Rosa omeiensis f. pteracantha and their chemotaxonomic significance

The investigation of the phytochemistry on the aerial parts of Rosa omeiensis f. pteracantha result in the isolation and authentication of one new phenolic compound, named methyl gallate 3- O - β -D-(6′- O -( p -hydroxybenzoyl))-glucopyranoside ( 1 ), along with nine known ones ( 2 – 10 ), and one prenylated benzoic acid derivative ( 11 ). The structure of the new compound was unambiguously characterized by comprehensive analysis of IR, UV, HR-ESI-MS, 1D NMR, and 2D NMR spectra, as well as comparative literature on optical rotation. Other compounds were identified as known structures by referencing their NMR data with literatures. All the isolated compounds were reported for the first time from R . omeiensis f. pteracantha . The chemotaxonomic significances of isolated compounds were discussed accordingly. • Eleven phenolic compounds were isolated from the Rosa omeiensis f. pteracantha. • Compound 1 was a new phenolic compound. • Six compounds have significant taxonomic significance for the Rosaceae family.