The molecule is a piperidinium ion that is benzamide substituted on nitrogen by a 2-hydroxyethyl group and at the 4-position by a [3-(4-carboxybutanamido)-N-methylpiperidinio]methyl group. It has a role as a hapten. It is a piperidinium ion and a quaternary ammonium ion.
5-[[1-[[4-(2-hydroxyethylcarbamoyl)phenyl]methyl]-1-methylpiperidin-1-ium-3-yl]amino]-5-oxopentanoic acid