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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Bioorg Med Chem Lett. 2011 Jun 6;21(15):4585–4588. doi: 10.1016/j.bmcl.2011.05.112

Figure 2.

Figure 2

Comparison between 7a (A) and ulifloxacin (B) showing loss of planarity when C-2 thioether is not constrained in the thiazetidine ring system. Minimizations performed by MM2 (shown) and HF 6-31G** were similar.