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The asymmetric unit of the title compound, C 15 H 17 NO 4 ·H 2 O, contains two organic mol­ecules with marginal differences between them and two water molecules. The chromine rings in both mol­ecules are essentially planar, with maximum deviations of 0.012 (2) and 0.060 (2) Å. The five-membered cyclo­pentane rings adopt envelope conformations in both mol­ecules. In the crystal, the components are linked by N—H⋯O, O—H⋯O and C—H⋯O hydrogen bonds, resulting in a three-dimensional network.

4-Amino-8-cyclopentyloxy-7-methoxy-2H-chromen-2-one monohydrate