1,1-Dimethyl-3-ethyl-1'-pentylspiro(1H-2-benzopyran-4(3H),4'-piperidin)-6-ol hydrobromide 73737-15-2 Spiro(1H-2-benzopyran-4(3H),4'-piperidin)-6-ol, 1,1-dimethyl-3-ethyl-1'-pentyl-, hydrobromide