ABSTRACT
The study about Eugenia dysenterica led to the isolation of 3-acetyl-urs-12-en-28-oic (1), 3-acetyl-olean-12-en-28-oic acid (2) and isoquercetin (3) from the stem barks, and of 3-O-ß-glucopyranosyl-ß-sitosterol (4), methyl 3-hydroxy-4-methoxybenzoate (5), methyl 4-hydroxyphenyl propionate (6), E-methyl-4-hydroxycinnamate (7), quercetin-3-O-(6êê-O-galloyl)-ß-d-glucopyranoside (8) and quercetin-3-O-ß-d-galactopyranoside (9) from the leaves. The structures 1-9 were set through the analysis of their NMR spectroscopic data. Compounds 2, 3 and 5-8 were reported for the first time in the Eugenia genus. Compound 8 reduced cell viability and presented IC50 values 40.3 and 36.7 µM, for the CCRF-CEM and the Kasumi-1 cells, respectively.
Subject(s)
Antineoplastic Agents, Phytogenic/chemistry , Antineoplastic Agents, Phytogenic/pharmacology , Eugenia/chemistry , Leukemia/drug therapy , Cell Line, Tumor , Drug Screening Assays, Antitumor , Flavonoids/chemistry , Flavonoids/pharmacology , Galactosides/chemistry , Galactosides/pharmacology , Humans , Inhibitory Concentration 50 , Magnetic Resonance Spectroscopy , Oleanolic Acid/chemistry , Plant Bark/chemistry , Plant Extracts/chemistry , Plant Leaves/chemistry , Quercetin/analogs & derivatives , Quercetin/chemistry , Quercetin/pharmacologyABSTRACT
A new orbitide named [1-8-NαC]-zanriorb A1 (1) was isolated and characterized from the leaves of Zanthoxylum riedelianum using NMR and mass spectrometry. The absolute configuration of the amino acids was determined using Marfey's method on the acid hydrolysates. Compound 1 induced cell death by apoptosis in Jurkat leukemia T cells (IC50 218 nM).
