2-Chloro-6-fluoro-9-(1-methyl-4-piperidylidene)-thioxanthene 4-(2-Chloro-6-fluoro-9H-thioxanthen-9-ylidene)-1-methylpiperidine 73846-44-3 Lu 12-304 Piperidine, 4-(2-chloro-6-fluoro-9H-thioxanthen-9-ylidene)-1-methyl-