Synonyms: 1-a-Carboxybenzyl-1,2,3,6-tetrahydro-1-methylpyridiniumiodide, ester with diethyl[2-(2-hydroxyethoxy)ethyl]methylammonium iodide(6CI); Pyridinium,1-[2-[2-[2-(diethylmethylammonio)ethoxy]ethoxy]-2-oxo-1-phenylethyl]-1,2,3,6-tetrahydro-1-methyl-,diiodide (9CI)