10457-86-0 Pyridinium, 1,2,5,6-tetrahydro-3-carboxy-1,1-dimethyl-, iodide, butyl ester Pyridinium, 3-(butoxycarbonyl)-1,2,5,6-tetrahydro-1,1-dimethyl-, iodide n-Butyl-1-methyl-1,2,5,6-tetrahydronicotinate methiodide