William P. Purcell, Ph. D., the founder and majority shareholder of MDI, serves as
its president and Chief Executive Officer.  In addition, Dr. Purcell alsoserves as
Chief Operating Officer and Director of Research and Development.  Dr. Purcell
has had a distinguished career as a Professor of medicinal Chemistry at The
University of Tennessee
(Memphis) and currently serves as an adjunct member
of the Graduate Faculty, Department of Chemistry, at the University of Memphis.


Dr. Purcell is a recognized expert in the field of molecular modeling and is a
pioneer in Quantitative Structure-Activity Relationships (QSAR) with his book, a
first in this area, entitled "Strategy of Drug Design:  A Molecular Guide To
Biological Activity" (John Wiley and Sons, New York, 1973).