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1550637 
Journal Article 
(E)-2-{[1-Carb-oxy-2-(1H-indol-3-yl)ethyl-iminio]meth-yl}-6-hy-droxy-phenolate 
Ba-Salamah, SA; Eltayeb, NE; Teoh, SG; Lo, KM 
2011 
Yes 
Acta Crystallographica. Section E: Structure Reports Online
ISSN: 1600-5368 
WILEY-BLACKWELL 
HOBOKEN 
67 
Pt 9 
o2389 
English 
22058986 
WOS:000294714900062 
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].