Molecules 2013, 18(3), 2769-2777; doi:10.3390/molecules18032769
Article

Secondary Metabolites from Sida rhombifolia L. (Malvaceae) and the Vasorelaxant Activity of Cryptolepinone

Postgraduate Program in Bioactive Natural and Synthetic Products, Health Sciences Center, Federal University of Paraíba, 58051-970, João Pessoa, PB, Brazil
* Author to whom correspondence should be addressed.
Received: 7 December 2012; in revised form: 31 January 2013 / Accepted: 7 February 2013 / Published: 1 March 2013
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Abstract: The phytochemical study of Sida rhombifolia L. (Malvaceae) led to the isolation through chromatographic techniques of eleven secondary metabolites: sitosterol (1a) and stigmasterol (1b), sitosterol-3-O-b-D-glucopyranoside (2a) and stigmasterol-3-O-b-D-glucopyranoside (2b), phaeophytin A (3), 173-ethoxypheophorbide A (4), 132-hydroxy phaeophytin B (5), 173-ethoxypheophorbide B (6), 5,7-dihydroxy-4'-methoxyflavone (7), cryptolepinone (8) and a salt of cryptolepine (9). Their structures were identified by 1H- and 13C-NMR using one- and two-dimensional techniques. In addition, the vasorelaxant activity of cryptolepinone in rat mesenteric artery rings is reported herein for the first time.
Keywords: phytochemical study; Sida rhombifolia L.; Malvaceae; cryptolepinone; vasorelaxant activity

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MDPI and ACS Style

Chaves, O.S.; Gomes, R.A.; Tomaz, A.C.A.; Fernandes, M.G.; das Graças Mendes Junior, L.; de Fátima Agra, M.; Braga, V.A.; de Fátima Vanderlei de Souza, M. Secondary Metabolites from Sida rhombifolia L. (Malvaceae) and the Vasorelaxant Activity of Cryptolepinone. Molecules 2013, 18, 2769-2777.

AMA Style

Chaves OS, Gomes RA, Tomaz ACA, Fernandes MG, das Graças Mendes Junior L, de Fátima Agra M, Braga VA, de Fátima Vanderlei de Souza M. Secondary Metabolites from Sida rhombifolia L. (Malvaceae) and the Vasorelaxant Activity of Cryptolepinone. Molecules. 2013; 18(3):2769-2777.

Chicago/Turabian Style

Chaves, Otemberg S.; Gomes, Roosevelt A.; Tomaz, Anna C.A.; Fernandes, Marianne G.; das Graças Mendes Junior, Leônidas; de Fátima Agra, Maria; Braga, Valdir A.; de Fátima Vanderlei de Souza, Maria. 2013. "Secondary Metabolites from Sida rhombifolia L. (Malvaceae) and the Vasorelaxant Activity of Cryptolepinone." Molecules 18, no. 3: 2769-2777.

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