1,3,5,7-tetramethyl-2,4,6,8(1H,3H,5H,7H)-pyrimido[4,5-g]pteridinetetrone

C₁₂H₁₂N₆O₄

Romerosa, A.Colacio, E.Suárez-Varela, J.Avila-Rosón, J. C.Hidalgo, M. A.Romero-Garzón, J.

Acta Crystallographica Section C (1995) 51, 5 1005-1007

a=15.750(3)Å   b=6.112(2)Å   c=13.704(3)Å

α=90.0°   β=105.98(3)°   γ=90.0°