Vilsmeier and Mannich reactions on (4S)-N2-substituted 4-methyl-2,4-dihydro-1H-pyrazino[2,1-b]quinazoline-3,6-diones

1. Fernandez, M.
2. Heredia, M.L.
3. De La Cuesta, E.
4. Avendaño, C.