<p>Pharmacophore models (A) Hypo A, (B) Hypo B and (C) Hypo C fitted to <b>13</b>. The chemical features are described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0033829#pone-0033829-g002" target="_blank">Figure 2</a>.</p