[1] Merck Res Labs, Dept Chem, Rahway, NJ 07065 USA
[2] Merck Res Labs, Dept CNS Biol, Kenilworth, NJ 07033 USA
[3] Merck Res Labs, Dept In Vitro Sci, Kenilworth, NJ 07033 USA
[4] Merck Res Labs, Dept Chem Modeling & Informat, Rahway, NJ 07065 USA
[5] Merck Res Labs, Dept Exploratory Drug Metab, Kenilworth, NJ 07033 USA
[6] Merck Res Labs, Dept Struct Chem, Kenilworth, NJ 07033 USA