Artículos de revistas
Warmingiins A And B, Two New Dimeric Naphthoquinone Derivatives From Sinningia Warmingii (gesneriaceae)
Registro en:
Journal Of The Brazilian Chemical Society. Soc Brasileira Quimica, v. 28, p. 598 - 602, 2017.
0103-5053
1678-4790
WOS:000396347700010
10.21577/0103-5053.20160204
Autor
Winiewski
Vanessa; Verdan
Maria Helena; Ribeiro
Marcos A.; Hernandez-Tasco
Alvaro J.; Salvador
Marcos J.; Stefanello
Maria Elida A.
Institución
Resumen
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Chemical investigation of Sinningia warmingii (Gesneriaceae) tubers lead to the isolation of two new dimeric naphthoquinone derivatives, named warmingiins A and B, besides six known compounds, aggregatin E, aggregatin F, tectoquinone, halleridone, cleroindicin B, and cornoside. All compounds were identified by spectroscopic analysis, mainly nuclear magnetic resonance (NMR) and mass spectrometry (MS), and comparison with the literature. The structure of the warmingiin A, which is an artifact of warmingiin B, was confirmed by X-ray diffraction analysis. Antimicrobial activity of the ethanolic extract and fractions of S. warmingii was evaluated against Staphylococcus aureus, S. epidermidis, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, C. dubliniensis, C. glabrata and C. parapsilosis. All samples were inactive. 28 4 598 602 CAPES FAEPEX- UNICAMP FAPESP CNPq Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)