3-Carboxy-1,1-dimethyl-4-hydroxypiperidinium iodide methyl ester 86343-58-0 N-Methyl-3-carbomethoxy-4-hydroxypiperidine methiodide Piperidinium, 3-carboxy-1,1-dimethyl-4-hydroxy-, iodide, methyl ester Piperidinium, 4-hydroxy-3-(methoxycarbonyl)-1,1-dimethyl-, iodide