Resumo

FRANCO, Martha S et al. CYTOTOXIC LABDANE DITERPENOIDS ISOLATED FROM THE HEXANE FRACTION OF THE Croton stipuliformis STEM BARK. Vitae [online]. 2011, vol.18, n.2, pp.173-182. ISSN 0121-4004.

The composition of the cytotoxic hexane fraction of the Croton stipuliformis bark was studied by means of a gas chromatography coupled to a mass spectrometry; sesquiterpenes and sterols were characterized as the main constituents. Along with these compounds, three labdane and seco-labdane diterpenoids, 8(17),12E,14-labdatrien-18-oic acid [3], 12E-3,4-seco-labda-4(18),8(17),12,14-tetraen-3-oic acid [2], and its methyl ester [1] were isolated from this fraction through preparative HPLC, and their structures were elucidated by HR-FABMS, 1D and 2D NMR analyses. Additionally, the cytotoxic activity of these three compounds against human tumor cell lines HEp-2, HT-29, MKN-45, MCF-7, and HeLa was assessed. The three compounds showed a non-specific and moderate cytotoxicity against the abovementioned cell lines.

Palavras-chave : Croton stipuliformis; Euphorbiaceae; labdane; MTT assay; cytotoxicity.

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