1,1'-(Ethylenebis(oxyethylene))bis(1-methylpiperidinium iodide) 111588-20-6 504 HC Diiodomethylate de N,N'bis(piperidylethoxy)ethylene [French] Piperidinium, 1,1'-(ethylenebis(oxyethylene))bis(1-methyl-, diiodide