Jeller, A. H.Silva, DHSLiao, L. M.Bolzani, Vanderlan da Silva [UNESP]Furlan, Maysa [UNESP]2014-05-202014-05-202004-07-01Phytochemistry. Oxford: Pergamon-Elsevier B.V., v. 65, n. 13, p. 1977-1982, 2004.0031-9422http://hdl.handle.net/11449/32701The triterpenes, 22beta-hydroxypristimerin and cognatine, were isolated together with the known compounds pristimerin, maytenin, 20alpha-hydroxymaytenin, 22beta-hydroxymaytenin, netzahualcoyol, netzahualcoyondiol and netzahualcoyone from root bark of Chei-Ioclinium cognatum. The structures of the isolated compounds were elucidated by interpretation of their spectral data, including gHMQC and gHMBC experiments. The isolates were investigated for their radical scavenging abilities through a spectrophotometric assay involving reduction of 2,2-diphenyl-picryl hydrazyl (DPPH). (C) 2004 Elsevier Ltd. All rights reserved.1977-1982engCheiloclinium cognatumhippocrateaceaequinonemethide triterpenesphenolic triterpeneantioxidant activityArtigo10.1016/j.phytochem.2004.03.039WOS:000223504100012Acesso restrito470200490423124844840836852516731308042794786872