Hindawi Publishing Corporation Evidence-Based Complementary and Alternative Medicine Volume 2015, Article ID 959081, 12 pages http://dx.doi.org/10.1155/2015/959081 Research Article Alkaloids in Erythrina by UPLC-ESI-MS and In Vivo Hypotensive Potential of Extractive Preparations Liara Merlugo,1,2 Marí C. Santos,2 Liane S. Sant’Anna,1,3 EversonW.F.Cordeiro,2 Luiz A. C. Batista,2 Silvia T. S. Miotto,4 Cássia V. Garcia,5 Cleci M. Moreira,1,3 and Andreas S. L. Mendez1,5 1 Programa de Pos-graduac´ ¸ao˜ em Bioqu´ımica, Universidade Federal do Pampa, BR 472 Km 585, Caixa Postal 118, 97508-000 Uruguaiana, RS, Brazil 2Laboratorio´ de Desenvolvimento e Controle de Qualidade de Medicamentos, Universidade Federal do Pampa, BR 472 Km 585, Caixa Postal 118, 97508-000 Uruguaiana, RS, Brazil 3Laboratorio´ de Fisiologia Cardiovascular, Universidade Federal do Pampa, BR 472 Km 585, Caixa Postal 118, 97508-000 Uruguaiana, RS, Brazil 4Departamento de Botanica,ˆ Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil 5Faculdade de Farmacia,UniversidadeFederaldoRioGrandedoSul,AvenidaIpiranga2752,90610-000PortoAlegre,RS,Brazil´ Correspondence should be addressed to Andreas S. L. Mendez;
[email protected] Received 21 April 2015; Revised 19 July 2015; Accepted 28 July 2015 Academic Editor: Nunziatina De Tommasi Copyright © 2015 Liara Merlugo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Erythrina species are used in popular medicine as sedative, anxiolytic, anti-inflammatory, and antihypertensive. In this work, we investigated the chemical composition of extracts obtained from leaves of E.