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. Author manuscript; available in PMC: 2008 Sep 15.
Published in final edited form as: Bioorg Med Chem Lett. 2007 Jul 20;17(18):5054–5057. doi: 10.1016/j.bmcl.2007.07.026

Figure 4.

Figure 4

ESI-MS spectra of probe 2 (a) without enzyme treatment, (b) after treating with esterase (10 units) for 10 min at 25 °C (c) after treating with esterase (10 units) for 60 min at 25 °C. MWs of probe 2 and 1=O are 563 and 521, respectively.