A HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC ASSAY FOR 5-METHOXY-3-[N-(4-(4-FLUORO-PHENYL)-4-OXOBUTYL)-1,2,5,6-TETRAHYDROPYRIDIN-3-YL-METHYL]-1H-INDOLE (BIMG 80), A POTENTIAL ANTIPSYCHOTIC AGENT, AND ITS APPLICATION IN BRAIN-TO-PLASMA DISTRIBUTION STUDIES IN THE RAT