The molecule is the conjugate acid of (S)-N-methylcoclaurine; major species at pH 7.3. It is an ammonium ion derivative and an organic cation. It is a conjugate acid of a (S)-N-methylcoclaurine.
(1S)-1-[(4-hydroxyphenyl)methyl]-6-methoxy-2-methyl-1,2,3,4-tetrahydroisoquinolin-2-ium-7-ol