piperidin-1-yl-quinoxalin-6-ylmethanone 1-piperidyl-quinoxalin-6-yl-methanone 1-piperidyl-(6-quinoxalinyl)methanone piperidino-quinoxalin-6-yl-methanone piperidin-1-yl-quinoxalin-6-yl-methanone 154235-83-3 173047-75-1 1-(6-Quinoxalinylcarbonyl)piperidine 1-(quinoxalin-6-ylcarbonyl)piperidine Ampalex BDP 12 CX 516 CX516 Piperidine, 1-(6-quinoxalinylcarbonyl)- C13675 CX-516