A new languidulane diterpenoid from Salvia mexicana var. mexicana |
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Authors: | Frontana-Uribe Bernardo Antonio Escárcega-Bobadilla Martha Verónica Estrada-Reyes Rosa Morales-Serna José Antonio Salmón Manuel Cárdenas Jorge |
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Institution: | Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, 04510 México D.F., México. |
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Abstract: | From the aerial parts of Salvia mexicana var. mexicana, two C-10 epimers (α and β) of salvimexicanolide were isolated. Our interpretation of the data, especially the 13C NMR, led us to conclude that the previously described 13C-NMR spectrum of the α-epimer was not accurately assigned and it actually corresponds to the β-epimer. The structures proposed for the salvimexicanolides were verified by means of NOESY experiments. Dugesin B, arbutin, naringenin and the mixture of oleanolic and ursolic acids were also isolated from this Salvia spp. |
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