1,5-Dimethyl citrate monohydrate from Dioscorea opposita Thunb.

The hydrated title compound, C8H12O7·H2O, was isolated from the Chinese yam Dioscorea opposita Thunb. An intra­molecular O—H⋯O hydrogen bond occurs in the organic mol­ecule. In the crystal structure, the mol­ecules are linked by inter­molecular O—H⋯O hydrogen bonds, thereby forming chains propagating in [010].