title: Antioxidant activity of Convolvulus hystrix Vahl and its chemical constituents.
abstract: Total alcohol and successive extracts (diethyl ether, chloroform, ethyl acetate and n-butanol) of Covolvulus hystrix Vahl were screened for their antioxidant activity using free radical 2-2-diphenyl-1-picrylhydrazyl (DPPH) and Trolox as reference substance. The tested extracts showed variable antioxidant activities. The highest antioxidant activity was achieved in total alcohol (48.32%) followed by ethyl acetate (37.8%) and n-butanol (32.96%) extracts. From the ethyl acetate extract four compounds were isolated and identified as quercetin, quercetin 3-0-rutinoside and quercetin-7-O-rhamnoside in addition to ferulic acid using different spectroscopic analysis such as, 1HNMR, 13CNMR, COSY, HMBC and HMQC.
authors: Medicinal and Aromatic Plants Department, Desert Research Center, Cairo, Egypt.
authors: Abd
authors: A
authors: El Raheim Mohammed Donia
authors: Saleh Ibrahim
authors: SI
authors: Alqasoumi
authors: Amani Shafeek
authors: AS
authors: Awaad
authors: Lyle
authors: L
authors: Cracker
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D031254:Convolvulus / Q000737:chemistry*; D003373:Coumaric Acids / Q000032:analysis; D051379:Mice; D010936:Plant Extracts / Q000494:pharmacology*; D011794:Quercetin / Q000032:analysis; D012431:Rutin / Q000032:analysis
chemical_list: D000975:Antioxidants; D003373:Coumaric Acids; D010936:Plant Extracts; D012431:Rutin; D011794:Quercetin; C004999:ferulic acid