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. Author manuscript; available in PMC: 2012 Sep 7.
Published in final edited form as: J Am Chem Soc. 2011 Aug 12;133(35):14042–14053. doi: 10.1021/ja2046167

Table 3.

Cell growth inhibition (IC50, nM) with spongistatin 1 and the synthesized analogs

MDA-MB-435 HT-29 H522-T1 U937
(+)-Spongistatin 1 0.0225 0.058 0.16 0.059
(−)-38 82.8 161.2 297.2 60.5
17 >1000 >1000 >1000 >1000