The title compound, C14H12O3, is an α-hy-droxy-carb-oxy-lic acid whose ortho-rhom-bic polymorph has been reported earlier [Qiu et al. (2007 ▸). Inorg. Chim. Acta, 360, 1819-1824]. The asymmetric unit contains two complete mol-ecules. Classical hydrogen bonds... ...
