The molecule is an ammonium ion derivative resulting from the protonation of one of the amino groups of (S,S)-2,5-di-(p-hydroxybenzyl)piperazine. The major species at pH 7.3. It is a conjugate acid of a (S,S)-2,5-di-(p-hydroxybenzyl)piperazine.
4-[[(2S,5S)-5-[(4-hydroxyphenyl)methyl]piperazin-4-ium-2-yl]methyl]phenol