The molecule is a piperidinium ion resulting from the protonation of the piperidine nitrogen of pibutidine; major species at pH 7.3. It is a conjugate acid of a pibutidine.
3-amino-4-[[(Z)-4-[4-(piperidin-1-ium-1-ylmethyl)pyridin-2-yl]oxybut-2-enyl]amino]cyclobut-3-ene-1,2-dione