Synthesis, characterization, and crystal structure of 1,3,7,9-tetramethylpyrido-[2,3-d:6,5-d′]-dipyrimidine-2,4,6,8-tetrone

1. Enrique-Mirón, C.
2. Quirós-Olozábal, M.
3. Romero-Molina, M.A.
4. Salas-Peregrín, J.M.
5. Sánchez-Sánchez, M.P.
6. Hueso-Ureña, F.
7. Moreno-Carretero, M.N.
8. Martín-Ramos, J.D.