The 2,3-Quinoxalinedione,1,4-dihydro-1,4-dimethyl-, also known as NSC521681, is an organic compound with the formula C₁₀H₁₀N₂O₂. With the CAS registry number 58175-07-8, its IUPAC name is 1,4-dimethylquinoxaline-2,3-dione.

Physical properties of 2,3-Quinoxalinedione,1,4-dihydro-1,4-dimethyl-: (1)ACD/LogP: 0.08; (2)#H bond acceptors: 4; (3)Index of Refraction: 1.583; (4)Molar Refractivity: 50.62 cm³; (5)Molar Volume: 151.3 cm³; (6)Surface Tension: 46.6 dyne/cm; (7)Density: 1.256 g/cm³; (8)Flash Point: 142.7 °C; (9)Enthalpy of Vaporization: 55.77 kJ/mol; (10)Boiling Point: 316.4 °C at 760 mmHg; (11)Vapour Pressure: 0.000411 mmHg at 25°C.

Uses of 2,3-Quinoxalinedione,1,4-dihydro-1,4-dimethyl-: it can be used to produce 1,4-dimethyl-6,7-dinitro-1,4-dihydro-quinoxaline-2,3-dione at temperature of 0 - 5 °C. This reaction will need reagents conc. H₂SO₄ and powdered KNO₃. The yield is about 82%.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: CN1C2=CC=CC=C2N(C(=O)C1=O)C
(2)InChI: InChI=1S/C10H10N2O2/c1-11-7-5-3-4-6-8(7)12(2)10(14)9(11)13/h3-6H,1-2H3
(3)InChIKey: MXWJILNOXSNALO-UHFFFAOYSA-N