Affiliation: | 1. Department of Chemistry, University of Iowa, Iowa City, IA 52242‐1294 (USA), Fax: (+1)?319‐335‐1270;2. Structural Chemistry, Global Pharmaceutical R&D, Abbott Laboratories, Abbott Park, IL 60064 (USA);3. Materials Science, Global Pharmaceutical R&D, Abbott Laboratories, Abbott Park, IL 60064 (USA), Fax: (+1)?847‐937‐7756 |