(S)-2-[(2R,3S)-2-Ammonio-3-hydr­oxy-3-(4-nitro­phen­yl)propanamido]-4-methyl­penta­noate monohydrate

The structure of the title compound, C(15)H(21)N(3)O(6)·H(2)O, is of inter­est with respect to assumed anti­cancer activity. The title mol­ecules are linked through inter­molecular O—H⋯O hydrogen-bonded chains along the a axis. These chains are connected by inter­molecular N—H⋯O hydrogen bonds through the crystallographic screw axis along [010], forming layers, which are stabilized by other N—H⋯O bonds with water O atoms as acceptors and O—H⋯O bonds with water H atoms as donors. The H atoms of the protonated amino cation are also involved in inter­molecular N—H⋯O bonding inter­actions.