The molecule is a phenyl sulfate oxoanion arising from arising from deprotonation of the sulfate OH group of L-tyrosine methyl ester 4-sulfate; major species at pH 7.3. It is a conjugate base of a L-tyrosine methyl ester 4-sulfate.
[4-[(2S)-2-amino-3-methoxy-3-oxopropyl]phenyl] sulfate