title: Taxiphyllin 6'-O-gallate, actinidioionoside 6'-O-gallate and myricetrin 2″-O-sulfate from the leaves of Syzygium samarangense and their biological activities.
abstract: Three new compounds were isolated from a MeOH extract of the leaves of Syzygium samarangense, one new cyanogenic glucoside, taxiphyllin 6'-O-gallate (1), one new megastigmane glucoside, actinidioionoside 6'-O-gallate (2), and one new sulfated flavonoid rhamnoside, myricetrin 2″-O-sulfate (3), together with 14 known compounds, lupeol (4), demethoxymatteucinol (5), cryptostrobin (6), betulinic acid (7), β-sitosterol glucoside (8), 2R-prunasin (9), myrciaphenone A (10), 1-feruloyl-β-D-glucopyranoside (11), (3S,5R,6R,7E,9S)-3,5,6,9-tetrahydroxymegastigman-7-ene (12), guaijaverin (13), myricetin 4'-methyl ether 3-O-α-L-rhamnopyranoside (14), myricetrin (15), gallic acid (16) and actinidioionoside (17). The structures of the new compounds were determined through a combination of spectroscopic, HPLC and chemical analyses.
authors.forename: Mamdouh Nabil
authors.initials: MN
authors.lastname: Samy
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, Minia University.
authors.forename: Nabil Samy
authors.initials: NS
authors.lastname: Mamdouh
authors.forename: Sachiko
authors.initials: S
authors.lastname: Sugimoto
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Matsunami
authors.forename: Hideaki
authors.initials: H
authors.lastname: Otsuka
authors.forename: Mohamed Salah
authors.initials: MS
authors.lastname: Kamel
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000633:toxicity; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000737:chemistry; D006801:Humans; D007891:Leishmania / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol / Q000737:chemistry; D008826:Microbial Sensitivity Tests; D008968:Molecular Conformation; D009570:Nitriles / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry / Q000378:metabolism; D011435:Propyl Gallate / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D027842:Syzygium / Q000737:chemistry* / Q000378:metabolism
chemical_list: D000890:Anti-Infective Agents; D000970:Antineoplastic Agents; D005419:Flavonoids; D016166:Free Radical Scavengers; D009570:Nitriles; C000598358:actinidioionoside 6'-O-gallate; C000598359:myricetrin 2'-O-sulfate; C000598357:taxiphyllin 6'-O-gallate; C011360:taxiphyllin; D011435:Propyl Gallate; D000432:Methanol