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. Author manuscript; available in PMC: 2011 Feb 15.
Published in final edited form as: J Control Release. 2009 Dec 24;141(3):303–313. doi: 10.1016/j.jconrel.2009.12.012

Figure 2.

Figure 2

Conversion of trigonal (Lewis acid) form of phenylboronic acid moiety to the tetrahedral (Lewis base) form in the presence of OH-, followed by bidentate condensation of cis-diol bearing ligands (sugars in the present case). Not shown is a relatively unimportant pathway in which sugar binds first to trigonal form. After Kataoka et al. [25].