title: (E)-2-{[1-Carb-oxy-2-(1H-indol-3-yl)ethyl-iminio]meth-yl}-6-hy-droxy-phenolate.
abstract: In the zwitterionic title compound, C(18)H(16)N(2)O(4), the dihedral angle between the planes of the benzene and indole rings is 26.38 (10)°. An intra-molecular N-H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, mol-ecules are linked through N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds into infinite chains propagating in [010].
authors: Salah Ahmed
authors: SA
authors: Ba-Salamah
authors: Naser Eltaher
authors: NE
authors: Eltayeb
authors: Siang Guan
authors: SG
authors: Teoh
authors: Kong Mun
authors: KM
authors: Lo