3 documents found, page 1 of 1
PHENOLIC DERIVATIVES AND ANTIOXIDANT ACTIVITY OF POLAR EXTRACTS FROM Bauhinia p...
Carvalho,Adonias Almeida; Santos,Lucivania Rodrigues dos; Farias,Ruth Raquel Soares de; Chaves,Mariana Helena; Feitosa,Chistiane MendesA tea made with the leaves or stem bark of Bauhinia pulchella Benth (Fabaceae) is used in the treatment of diabetes. Ethanol (EEF) and aqueous (EAF) extracts were obtained from the leaves and the antioxidant and citotoxic activities were tested, as well as quantify the content of flavonoids and phenolic compounds (TPC). EEF and EAF showed similar profiles by HPLC, with the presence of three compounds. Column ch...
Trachylobane and kaurane diterpenes from Croton floribundus spreng
Uchôa,Paula Karina S.; Silva Jr.,José Nunes da; Silveira,Edilberto Rocha; Lima,Mary Anne S.; Braz-Filho,Raimundo; Costa-Lotufo,Letícia VerasA new trachylobane diterpene ent-trachyloban-18,19-diol (1) was isolated from root bark of Croton floribundus, along with known diterpenes ent-trachyloban-19-oic acid (2), 15b-hydroxy-ent-trachyloban-19-oic acid (3), ent-trachyloban-19-ol (4), ent-kaur-16-en-19-oic acid (5), ent-kaur-16-ene-6a,19-diol (6) and ent-16a-hydroxykaur-11-en-19-oic acid (7). ent-trachyloban-18,19-diol (1) was submitted to derivatizati...
Blainvillea rhomboidea: constituintes químicos e atividade citotóxica
Gomes,Regina Ferreira; Santos,Hélcio Silva dos; Albuquerque,Maria Rose Jane R.; Pessoa,Otília Deusdênia L.; Lotufo,Leticia V. Costa; Pessoa,Claudia do ÓThe phytochemical investigation of the ethanol extract from the aerial parts of Blainvillea rhomboidea (Asteraceae) resulted in the isolation and characterization of 8β-tigloyloxy-grazielia acid, together with the flavonoids derrone, acacetin, luteolin and luteolin 7-methyl ether, and p-(1-methyl-ethan-1-ol)-phenol. The structures of all compounds were determined by spectroscopic methods (¹H and 13C NMR and HRE...