Crystal structures of <i>rac</i>-2,3-diphenyl-2,3,5,6-tetrahydro-4<i>H</i>-1,3-thiazine-1,1,4-trione and <i>N</i>-[(2<i>S</i>,5<i>R</i>)-1,1,4-trioxo-2,3-diphenyl-1,3-thiazinan-5-yl]acetamide
Acta crystallographica. Section E, Crystallographic communications