2-Oxo-2H-chromen-4-yl propionate

In the title compound, C₁₂H₁₀O₄, the atoms of the 2-oxo-2H-chromene ring system and the non-H atoms of the 4-substituent all lie on a crystallographic mirror plane. The mol­ecular structure exhibits an intra­molecular C—H...O hydrogen bond, which generates an S(6) ring. In the crystal, mol­ecules form R₃²(12) trimeric units via C—H...O inter­actions which propagate into layers parallel to the ac plane. These layers are linked by weak C—H...O inter­actions along the [010] direction, generating a three-dimensional network.