Peltomexicanin, a Peltogynoid Quinone Methide from Peltogyne Mexicana Martínez Purple Heartwood

Abstract

Peltomexicanin (7,10-dihydroxy-6,12-dioxa-5H-tetraphen-3-one) is a new peltogynoid quinone methide isolated from Palo Morado (Peltogyne mexicana Martínez) heartwood by column chromatography. Its chemical structure was elucidated by IR, NMR ( 1 H, 13 C), 2D NMR experiments (COSY, NOESY, HMQC, and HSQC), ESI-MS, and UV-Vis spectroscopic analysis. According to HPLC quantification, this compound is the main pigment and accounts for 1.21% of Palo Morado heartwood material. The antioxidant activity of peltomexicanin and dried methanolic extract (DEx) of purple heartwood was evaluated using the radical of 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) assay, and the corresponding values expressed as Trolox equivalents (µmol TE/mg sample) were 4.25 and 4.57, respectively.

Pollination of Peltogyne chrysopis: an endemic tree of the Atlantic Forest

“…Peltogyne is a poorly-studied legume genus with respect to its mating system, with information available for basically only its fruiting phenology (Rocha et al 2006). There is also information in the literature concerning its taxonomy (e.g., Silva et al 1976), phytochemistry (e.g., Almeida et al 1974Gutiérrez-Macías et al 2016), herbivory ecology (e.g., Nascimento & Proctor 1996;, and population ecology (e.g., Nascimento & Proctor 2001). Thus, the present study is the first to investigate some of the aspects of the breeding system of a species of Peltogyne.…”

Antimelanogenesis Effects of Leaf Extract and Phytochemicals from Ceylon Olive (Elaeocarpus serratus) in Zebrafish Model

“…The structures of isolated compounds were determined and characterized by means of spectral analyses, including ultraviolet-visible spectroscopy (UV/VIS, V-550, Jasco, Tokyo, Japan), Fourier transform infrared spectroscopy (FTIR, FTS-40, Bio-rad, Hercules, CA, USA), and mass spectroscopy (MS, MAT-958, Finnigan, MA, USA). Nuclear magnetic resonance spectroscopy (NMR), including 1D ( 1 H-NMR, 500 MHz; 13 C-NMR, 125 MHz) and 2D NMR (HSQC and HMBC), were recorded with a Bruker AVIII NMR spectrometer (Bruker Avance, Rheinstetten, Germany) [ 29 , 30 , 31 , 32 ].…”