1-((9,10-Dihydro-4-oxo-4H-benzo(4,5)cyclohepta(1,2-b)furan-3-yl)carbonyl)piperidine 83494-77-3 Piperidine, 1-((9,10-dihydro-4-oxo-4H-benzo(4,5)cyclohepta(1,2-b)furan-3-yl)carbonyl)-