Affiliation: | Process Research & Development, MRL, Merck & Co. Inc., 770 Sumneytown Pike, West Point, PA 19486 USA.; Computational and Structural Chemistry, MRL, Merck & Co. Inc., 126 E Lincoln Ave, Rahway NJ 07065 USA.; Discovery Chemistry, MRL, Merck & Co. Inc., 770 Sumneytown Pike, West Point, PA 19486 USA |