New reports on surface flavonoids from Chamaebatiaria (Rosaceae), Dodonaea (Sapindaceae), Elsholtzia (Lamiaceae), and Silphium (Asteraceae)

Abstract

Lipophilic exudates of one species each of Chamaebatiaria and Elsholtzia, two species of Silphium and four Dodonaea species were analyzed for flavonoid aglycones. In addition to a number of well-known and widely distributed flavonoids, several very rare and one novel natural flavonol were isolated and identified. 1 H and 13 C NMR data of four flavanones and two flavones are reported.

Composition, Antioxidant Potential, and Antimicrobial Activity of Helichrysum plicatum DC. Various Extracts

“…An interesting feature of nonpolar DCM and ACN extracts is the presence of (poly)methoxylated flavones, i.e. dimethoxy- (49,53) and pentamethoxyflavones in DCME (46,47) and methoxy-(51, 52), dimethoxy- (50), and triethoxydimethoxy flavones in ACNE (54,55,57). [22] + + + arenol [23] + + + plicatipyrone analog [22] + arzanol [27] + + + heliarzanol [23] + + cycloarzanol [23] + helipyrone diacetate [25] + + methylarzanol [23] + + 3-[1-[3-acetyl-2,4,6-trihydroxy-5-(3-methyl-2-buten-1-yl)phenyl]ethyl]-6-ethyl-4-hydroxy-5-methyl-2H-pyran-2-one [23] + + auricepyrone [22], 23-methyl-6-O-desmethylauricepyrone [22] + helicerastripyrone [28] [29] + plicatipyrone analog [26]…”

“…Compound Class/Name EE DCME ACNE 2',3'-dihydroxypuberulin [31] + 7-(2,3-dihydroxy-3-methylbutoxy)-5-hydroxy-6-methoxy-2H-1-benzopyran-2-one [32] + + coumarin derivative [33,34] [37] + italipyrone [22] + italipyrone analog [22] + γ-pyrone (chromone) 3-(acetyloxy)-2,3-dihydro-5,7-dihydroxy-6-(3-methyl-2-butenyl)-2-phenyl-4H-1-benzopyran-4-one [38] + 2,3-dihydro-5,7-dihydroxy-3-methyl-8-(3-methyl-2-butenyl)-2-(1-methylethyl)-4H-1-benzopyran-4-one [39] + Flavonoid flavone apigenin-7-O-glucoside [4] + apigenin-5-O-glucoside [40] + luteolin [41] + 3,5,6,7,8-pentamethoxyflavone [42] + 3',4',5,6,7-pentamethoxyflavone [43] + apigenin [40] + dihydroxy-dimethoxyflavone [44] + jaceosidin [45] + chrysoeriol [45] + 5,7-dihydroxy-3-methoxyflavone [44] + 5,7,4'-trihydroxy-3,6-dimethoxy-3'-prenylflavone [46] + TEDMF 1 [43] [43] + flavanone naringenin-5-O-glucoside [40] + naringenin-4 -O-glucoside [48] + naringenin-7-O-glucoside [40] + eriodictyol [49] + naringenin [40] + + flavonol quercetin-3-O-glucoside [4], hyperoside (quercetin-3-O-galactoside) [4] + kaempferol-3-O-glucoside [50] + Table 1. Cont.…”

Elsholtzia: phytochemistry and biological activities

“…A small amount of 5, 6-dihydroxy-7, 8-dimethoxy flavone ( 2 ) from E . splendens was obtained by preparative TLC, which is the second report except its first isolation from the roots of Scutellaria ramosissima [8]. Luteolin 7- O -[6"-(3"'-hydroxy-4"'-methoxy cinnamoyl)]-β-D-glucopyranoside ( 28 ) and luteolin 7- O -(6"-feruloyl)-β-D-glucopyranoside ( 29 ) are very semblable in structure.…”

Computational Evaluation and Anti-inflammatory and Analgesic Activities of Nebrodenside A Isolated From Dodonaea viscosa

“…1 In addition, the extract of D. viscosa can be used as local anesthetic, muscle relaxant, antifungal, anti-ulcerogenic, and antiparasitic agent. 2 Recent research has been in progress to isolate such drugs from the natural sources, especially, medicinal plants which have high efficacy and low side effects. In spite of recent advancements in therapeutic management of pain and inflammation, potent drugs with lower side effects are needed as therapies for several agonizing inflammatory diseases.…”