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The title compound (systematic name: 4-oxopentanoic acid), C5H8O3, is close to planar (r.m.s. deviation = 0.0762 Å). In the crystal, the molecules interact via O—H
O hydrogen bonds in which the hydroxy O atoms act as donors and the ketone O atoms in adjacent molecules as acceptors, forming C(7) chains along [20-1].
O hydrogen bonds in which the hydroxy O atoms act as donors and the ketone O atoms in adjacent molecules as acceptors, forming C(7) chains along [20-1].
