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Cucurbitacins are known to produce cytotoxic and anticancer activities. Two novel norcucurbitacin glucosides (Wv1 and Wv2) have recently been isolated from a purified fraction obtained from the rhizome of Wilbrandia verticillata. The present study evaluates the cytotoxic and antitumour activities of these norcucurbitacins. We have found a regular cytotoxicity in KB cells (Cy50 = 12 micrograms/ml) as well as a significant inhibition in the Walker 256 carcinosarcoma growth (approximately 75%).

Evaluation of the purified fraction of Wilbrandia (c. f. ) verticillata for antitumour activity