Secondary metabolites from pericarp of Juglans regia

Phytochemical Study of Juglans regia L. Pericarps from Greece with a Chemotaxonomic Approach

“…Among them seven phenolic acids, one diarylheptanoid, one neo‐lignan, seven flavonoids, two phenylethanoids and one hydrolyzed tannin, were identified in the different extracts of the pericarps. In agreement with Du et al., the isolated syringic acid ( 14 ), vanillic acid ( 15 ) and gallic acid ( 16 ) are widely distributed plant metabolites. In addition, this is the second report of caffeic acid ( 17 ) and trans ‐ferulic acid ( 18 ) in J. regia .…”

“…The species of Juglandaceae family are characterized by a plethora of secondary metabolites, with tetralones, naphthoquinones and diarylheptanoids being useful chemotaxonomic markers within Juglandaceae genera . So far, literature data give information only on the chemical profile of the Juglandaceae taxa growing in Asia . Therefore, the current study claims to be the first report of the chemical composition of J. regia pericarps from two different habitats of Greece and chemotaxonomic implications with the Asian Juglandaceae genera are discussed.…”

Hydroethanolic extract of Juglans regia L. green husks: A source of bioactive phytochemicals

“…pericarps, green husks, stem-bark, branches, etc.) (Du et al, 2014;Li et al, 2013Li et al, , 2008aLiu et al, 2010;Talapatra et al, 1988;Wang et al, 2017). Particularly, the tetralone derivatives found in green husks of J. regia usually occur as hydroxyl, hexosyl and hydroxybenzoyl derivatives, with several isomeric alternatives (Zhou et al, 2015).…”

“…A few studies can be found for J. regia L. in which the phytochemical composition of green husks has been determined by HPLC coupled to a UV/DAD detector (Akbari et al, 2012;Chatrabnous et al, 2018;Cosmulescu et al, 2011Cosmulescu et al, , 2010Liu et al, 2008;Soto-Maldonado et al, https://doi.org/10.1016/j.fct.2020.111189 Received 4 January 2020; Received in revised form 6 February 2020; Accepted 7 February 2020 2019; Stampar et al, 2006), reporting the amounts of juglone, phenolic acids, flavonoids and/or tetralone derivatives in the biomass. In another study, phenolic acids and tetralone derivatives were the main compounds identified in samples collected in China, using spectroscopic analysis (UV-Vis, 1H NMR, 13C NMR, 2D NMR, HR-ESI-MS) (Du et al, 2014). Other authors identified phenolic acids and flavonoids during the characterization performed this time by LC-MS (Gawlik-Dziki et al, 2014).…”

A Review of Traditional Medicinal Plants from Kachin State, Northern Myanmar

“…The leaves have been reported to contain apigenin (11), myricetin, quercetin, kaempferol, quercetin-3-O-arabinoside (12), quercetin-3-O-xyloside (13), quercetin-3-O-galactoside, quercetin-3-O-rhamnoside (14), and kaempferol-O-pentoside [31] [32]. The pericarp of J. regia is reported to contain five α-tetralone derivatives, five phenolic acids, two phenylpropanoids, one diarylheptanoid, one sesquiterpene, and two α-tetralone dimers [33]. Biological activities of J. regia include antioxidant properties [34], antitumor effects and immune regulation activity [35]; however, further biological investigations are needed to confirm the traditional uses.…”