A new acylated flavonol glycoside, called monochaetin, was isolated along with three known flavonoids from the leaves of Monochaetum multiflorum, and its structure was characterized as a novel di-hyperin ester of 3,3',4,4'-tetrahydroxy-μ-truxinic acid on the basis of chemical methods and 2D-NMR spectral analyses.
flavonoid, Monochaetum multiflorum, Melastomataceae, monochaetin, acylated hyperin, tetrahydroxy-μ-truxinic acid
Publication DOI: 10.1248/cpb.47.1510Journal NLM ID: 0377775Publisher: Pharmaceutical Society Of Japan
Institutions: Faculty of Pharmaceutical Sciences, Okayama University, Tsushima, Okayama 700-8530, Japan
Methods: 13C NMR, 1H NMR, methylation, ESI-MS, acid hydrolysis, HPLC, UV, optical rotation measurement, HR-ESI-MS, HMQC, DEPT, NOESY