2,4-oxazolidinedione 2,4-oxazolidinedione 2,4-oxazolidinedione is an organic compound with the formula hn(co)2och2. it is a white solid. the parent ring is not particularly important, but this core structure is found in a variety anticonvulsant drugs. the parent compound is obtained by treating chloroacetamide with bicarbonate. dimethadione ethadione paramethadione trimethadione 2,4-oxazolidenedione names preferred iupac name 1,3-oxazolidine-2,4-dione other names 2,4-oxazolidenedione identifiers cas number 2346-26-1 y 3d model (jsmol) interactive image chemspider 87905 y pubchem cid 97389 unii r22d15229r y comptox dashboard (epa) dtxsid60894083 inchi inchi=1s/c3h3no3/c5-2-1-7-3(6)4-2/h1h2,(h,4,5,6) ykey: cownfyyyzfrnoy-uhfffaoysa-n yinchi=1s/c3h3no3/c5-2-1-7-3(6)4-2/h1h2,(h,4,5,6)key: cownfyyyzfrnoy-uhfffaoysa-n smiles o=c1nc(=o)oc1 properties chemical formula c3h3no3 molar mass 101.061 g·mol−1 appearance white solid melting point 89–90 °c (192–194 °f; 362–363 k) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references