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The Prediction of Chromosomal Effects and Their ... - Lhasa Limited

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Initial<br />

toxicophore:<br />

O<br />

N<br />

O<br />

N<br />

Toxicophore development<br />

R<br />

Where R =<br />

any heteroatom<br />

Additional<br />

examples included:<br />

O<br />

N<br />

O<br />

HN<br />

N<br />

OH<br />

O<br />

O<br />

F<br />

OH<br />

Capecitabine, a clastogenic<br />

5-fluorocytidine<br />

Underlying<br />

mechanism:<br />

5-Fluorouracils <strong>and</strong> 5fluorocytidines<br />

inhibit<br />

thymidylate synthetase

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