(2S*)-2-Ammonio-3-(1H-indol-3-yl)propionate pyridine-2,4-dicarboxylic acid ethanol solvate

In the title compound, C11H12N2O2 center dot C7H5NO4 center dot C2H6O, the (2S*)-2-amino-3-(1H-indol-3-yl) propionic acid is present in the zwitterionic form. In the crystal structure, 2-amino-3-(1H-indol-3-yl) propionic acid molecules and pyridine-2,4-dicarboxylic acid molecules are linked through strong intermolecular O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds, forming layers parallel to (100). The layers are linked through the ethanol molecules via somewhat weaker intermolecular O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds, forming thus a three-dimensional network. Weak C-H center dot center dot center dot O and N-H center dot center dot center dot N hydrogen bonding and pi-pi interactions between the aromatic rings are also present.