title: 5-Methyl-1,2-oxazole-3-carb-oxy-lic acid.
abstract: In the crystal structure of the title compound, C(5)H(5)NO(3), all the non-H atoms are approximately coplanar: the carb-oxy O atoms deviating by 0.013 (2) and -0.075 (2) Å from the isoxazole ring plane. In the crystal, the molecules form inversion dimers linked by pairs of O-H⋯O hydrogen bonds and the dimers stack via π-π inter-actions [centroid-centroid distance = 3.234 (2) Å].
authors: Ordered Matter Science Research Center, College of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096,  People's Republic of China.
authors: Mei-Ling
authors: ML
authors: Pan
authors: Yang-Hui
authors: YH
authors: Luo
authors: Jin-Feng
authors: JF
authors: Li