RT journal article
T1 Hydrolysable Tannins and Biological Activities of Meriania hernandoi and Meriania nobilis (Melastomataceae)
A1 Valverde Malaver, Claudia Lorena
A1 Colmenares Dulcey, Ana Julia
A1 Rial Cumbrera, Carlos
A1 Varela Montoya, Rosa María
A1 González Molinillo, José María
A1 Macías Domínguez, Francisco Antonio
A2 Química Orgánica
K1 Melastomataceae
K1 Meriania; M. hernandoi
K1 M. nobilis
K1 polyphenols
K1 hydrolysable tannins
K1 DPPH
K1 FRAP
K1 phytotoxicity
AB A bio-guided study of leaf extracts allowed the isolation of two new macrobicyclichydrolysable tannins, namely merianin A (1) and merianin B (2), and oct-1-en-3-ylb-xylopyranosyl-(1”-6’)-b-glucopyranoside (3) from Meriania hernandoi, in addition to 11 knowncompounds reported for the first time in the Meriania genus. The structures were elucidated byspectroscopic analyses including one- and two-dimensional NMR techniques and mass spectrometry.The bioactivities of the compounds were determined by measuring the DPPH radical scavengingactivity and by carrying out antioxidant power assays (FRAP), etiolated wheat coleoptile assaysand phytotoxicity assays on the standard target species Lycopersicum esculentum W. (tomato).Compounds 1 and 2 exhibited the best free radical scavenging activities, with FRS50 values of2.0 and 1.9  M, respectively.
PB MDPI
SN 1420-3049
YR 2019
FD 2019-02
LK http://hdl.handle.net/10498/21259
UL http://hdl.handle.net/10498/21259
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026