Acer rubrum phenolics include A-type procyanidins and a chalcone

Wan, C.; Yuan, T.; Xie, M.; Seeram, N.P. Acer rubrum phenolics include A-type procyanidins and a chalcone. Biochemical Systematics and Ecology, 2012, 44, 1-3.


The genus Acer (Aceraceae), commonly known as maple, contains approximately 200 species distributed in Asia, North America, and Europe (van Gelderen et al., 1994). Of these, thirteen species are indigenous to North America including the red maple (Acer rubrum L.) species which was used by the Native Americans for a variety of medicinal purposes (Ball, 2007; Arnason et al., 1981; Royer et al., 2011). The stems of red maple were collected in August 2009 by the Federation of Maple Syrup Producers of Quebec (Canada), shipped to our laboratory, and identified by Mr. J. Peter Morgan, (Senior Gardener, College of Pharmacy, University of Rhode Island). A voucher specimen (JPMCS2) has been deposited in the Heber Youngken Medicinal Garden and Greenhouse (College of Pharmacy, University of Rhode Island). 2. Previous work Phenolics are the predominant metabolites reported from the A. rubrum species. Previous studies have reported B-type linkage procyanidins (Narayanan and Seshadri, 1969), galloyl derivatives, ellagic acid, flavonols and flavanols (Abou-Zaid and Nozzolillo, 1999; Abou-Zaid et al., 2001, 2009), 2,3-dihydro-3,5-dihydroxy-6-methoxy-4H-pyran-4-one (Boyer et al., 2002) and glucomannan (Mian and Timell, 1960) from A. rubrum wood and leaves. In addition, our laboratory has recently reported nine new gallotannins and two new phenolic glycosides from A. rubrum bark and stems (Wan et al., 2011; Yuan et al., 2011).