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L-gossypol

The levo-enantiomer of an orally bioavailable polyphenolic aldehyde, derived primarily from unrefined cottonseed oil, with potential antineoplastic activity. Mimicking the inhibitory BH3 (Bcl-2 homology 3) domain of endogenous antagonists of Bcl-2, L-gossypol binds to and inhibits various anti-apoptotic Bcl-2 proteins, which may result in the inhibition of tumour cell proliferation and the induction of tumour cell apoptosis. This agent has greater affinity for Bcl-2 proteins than racemic gossypol.

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