title: (E)-2-[(2,4-Dihy-droxy-benzyl-idene)aza-nium-yl]-3-(1H-indol-3-yl)propano-ate monohydrate.
abstract: In the zwitterionic title compound, C(18)H(16)N(2)O(4)·H(2)O, the dihedral angle between the planes of the benzene and indole rings is 39.20 (8)°. An intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, inter-molecular hy-droxy and water O-H⋯O(carboxyl-ate) and N(+)-H⋯O(carboxyl-ate) and indole N-H⋯O(water) hydrogen bonds give a three-dimensional structure.
authors.forename: Salah Ahmed
authors.initials: SA
authors.lastname: Ba-Salamah
authors.forename: Naser Eltaher
authors.initials: NE
authors.lastname: Eltayeb
authors.forename: Siang Guan
authors.initials: SG
authors.lastname: Teoh
authors.forename: Kong Mun
authors.initials: KM
authors.lastname: Lo
references.citation: Eur J Med Chem. 2000 Sep;35(9):805-13
references.pmid: 11006482
references.citation: Bioorg Med Chem Lett. 2006 Apr 15;16(8):2127-9
references.pmid: 16458506
references.citation: Bioorg Med Chem. 2006 Nov 15;14(22):7482-9
references.pmid: 16879972
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677