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. Author manuscript; available in PMC: 2008 Jun 20.
Published in final edited form as: J Am Chem Soc. 2007 Jan 17;129(2):361–370. doi: 10.1021/ja0656604

Table 1.

Bioactivity of paclitaxel and analogs

Compound Tubulin Assembly activity, ED50, μM A2780 Cytotoxicity IC50, μM
1 (PTX) 1.7 ± 0.4 0.023
4 3.5 ± 0.7 7.6
5 2.6 ± 0.5 0.047