title: Ethyl [(benzyl-aza-nium-yl)(2-hy-droxy-phen-yl)meth-yl]phospho-nate.
abstract: The title compound, C(16)H(20)NO(4)P, crystallizes as a zwitterion. In the mol-ecule, the two aromatic rings form a dihedral angle of 55.2 (1)°. In the crystal, inter-molecular N-H⋯O and O-H⋯O hydrogen bonds link the mol-ecules into columns propagating in [010].
authors.affiliation: College of Chemistry, Liaoning University, Shenyang, Liaoning 110036,  People's Republic of China.
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Zhang
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.forename: Chunhua
authors.initials: C
authors.lastname: Ge
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhang
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references.pmid: 19171970