1,1'-(Ethylenebis(1,3-dioxolane-2,4-diylmethylene))bis(1-methylpiperidinium) diiodide 1,2-Bis(4'-piperidinomethyl-1',3'-dioxolanyl-2')ethane dimethiodide 15483-62-2 Piperidinium, 1,1'-(ethylenebis(1,3-dioxolane-2,4-diylmethylene))bis(1-methyl-, diiodide