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<p>and consequently less hydrolysis of the lactone.CPT has affinity for human serum albumin (HSA), especially the carboxylate form of CPT. Because of that, the <a href="page.php?w=Chemical_equilibrium">equilibrium</a> between the lactone ring and the carboxylate form is driven toward the carboxylate. Reduced drug-HSA <a href="page.php?w=Drug_interaction">interactions</a> could result in improved activity.</p>

<p><big>Structure-activity relationship</big></p>
<p>Studies have shown that <a href="page.php?w=Substitution_%28chemistry%29">substitution</a> at</p><p>
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