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

In the title compound, C(11)H(12)N(2)O(2)·C(7)H(5)NO(4)·C(2)H(6)O, 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⋯O and N—H⋯O hydrogen bonds, forming layers parallel to (100). The layers are linked through the ethanol mol­ecules via somewhat weaker inter­molecular O—H⋯O and N—H⋯O hydrogen bonds, forming thus a three-dimensional network. Weak C—H⋯O and N—H⋯N hydrogen bonding and π–π inter­actions between the aromatic rings are also present.