1,1'-(Vinylenebis(1,3-dioxolane-2,4-diylmethylene))bis(1-methylpiperidinium) diiodide 1,2-Bis(4'-piperidinomethyl-1',3'-dioxolanyl-2')ethylene dimethiodide 17039-23-5 Piperidinium, 1,1'-(vinylenebis(1,3-dioxolane-2,4-diylmethylene))bis(1-methyl-, diiodide