1H and 13C NMR assignments of two new isomeric bisbenzylisoquinoline alkaloids from Cissampelos sympodialis Eichl. (Menispermaceae) |
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| Authors: | Alexsandro Fernandes Marinho Eduardo de Jesus Oliveira Josean Fechine Tavares Raimundo Braz Filho Jose Maria Barbosa‐Filho |
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| Institution: | 1. Centro de Biotecnologia, Universidade Federal da Paraíba, , 58051‐970 Jo?o Pessoa, PB, Brazil;2. Centro de Ciências e Tecnologias, Universidade Estadual do Norte Fluminense, , 28013‐600 Campos dos Goytacazes, RJ, Brazil |
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| Abstract: | des‐7′‐O‐methylroraimine (compound 1) and epi‐des‐7′‐O‐methylroraimine (compound 2), two new isomeric bisbenzylisoquinoline alkaloids were isolated and characterized as a mixture from the rhizomes of Cissampelos sympodialis Eichl. The unambiguous structural elucidation of both isomers was performed with the aid of HR‐ESI‐MS, FT‐IR, and NMR techniques including COSY, HMQC, HMBC, and NOESY. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1H 13C bisbenzylisoquinoline alkaloids structure elucidation epimers Cissampelos sympodialis |
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