()-5-Ethyl-1-methyl-5-phenyl­pyrimidine-2,4,6-trione at 163 K

A low-temperature [163 (2) K] redetermination of the crystal structure of the title compound, C₁₃H₁₄N₂O₃ [originally determined by Bideau, Marly & Housty (1969). C. R. Acad. Sci. Ser. C, 269, 549-551], has been performed. Although no gross strucural differences have been observed, H atoms have been located and the extended structure ex­amined.