7-epi-Taxol is an active metabolite of taxol, with activity comparable to that of taxol against cell replication, promoting microtubule bundle formation and against microtubule depolymerization.
7-epi-Taxol (7-Epitaxol) is a metabolite of taxol[1]. 7-epi-Taxol has activity comparable to that of taxol on cell replication, microtubule bundle formation and in vitro microtubule polymerization[2].
References:
[1]. Royer I, et al. Paclitaxel metabolites in human plasma and urine: identification of 6 alpha-hydroxytaxol, 7-epitaxol and taxol hydrolysis products using liquid chromatography/atmospheric-pressure chemical ionization mass spectrometry. Rapid Commun Mass Spectrom. 1995;9(6):495-502.
[2]. Ringel I, et al. Taxol is converted to 7-epitaxol, a biologically active isomer, in cell culture medium. J Pharmacol Exp Ther. 1987 Aug;242(2):692-8.