title: 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 (¹H, (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.
authors: Department of Environmental Systems Engineering, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu S/N, Unidad Profesional Adolfo López Mateos, Gustavo A. Madero, México City CP 07738, Mexico. pau_21_gm@hotmail.com.
authors: Paulina
authors: P
authors: Gutiérrez-Macías
authors: Department of Organic Chemistry, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala, S/N. Miguel Hidalgo, México City CP 11340, Mexico. javierperaltacruz@yahoo.com.
authors: Javier
authors: J
authors: Peralta-Cruz
authors: Division of Science Forestry, Universidad Autónoma Chapingo, Carr. Mexico-Texcoco Km 38.5, Texcoco, México State CP 56230, Mexico. aborja@correo.chapingo.mx.
authors: Amparo
authors: A
authors: Borja-de-la-Rosa
authors: Department of Environmental Systems Engineering, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Av. Wilfrido Massieu S/N, Unidad Profesional Adolfo López Mateos, Gustavo A. Madero, México City CP 07738, Mexico. bbarraganh@ipn.mx.
authors: Blanca E
authors: BE
authors: Barragán-Huerta
mesh_terms: D052160:Benzothiazoles / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D007887:Fabaceae / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification; D006576:Heterocyclic Compounds, 4 or More Rings / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D013451:Sulfonic Acids / Q000737:chemistry; D014934:Wood / Q000737:chemistry
chemical_list: D052160:Benzothiazoles; D016166:Free Radical Scavengers; D006576:Heterocyclic Compounds, 4 or More Rings; D010936:Plant Extracts; D013451:Sulfonic Acids; C000611954:peltomexicanin; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid
keywords: Peltogyne mexicana Martínez; peltogynoids; peltomexicanin; purple heartwood; quinone methide