The molecule is dication of berbamunine arsing from protonation of both tertiary amino groups; major species at pH 7.3. It is a conjugate acid of a berbamunine.
(1S)-1-[[4-[2-hydroxy-5-[[(1R)-7-hydroxy-6-methoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium-1-yl]methyl]phenoxy]phenyl]methyl]-6-methoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium-7-ol