Used as an intermediate in the synthesis of biologically active compounds, particularly in the development of kinase inhibitors for pharmaceutical research. Featuring a formyl group at the 2-position and a tert-butyl carboxylate at the 6-position on a 7,8-dihydropyrido[4,3-d]pyrimidine scaffold, its structure allows for selective modification through reactions such as condensation or functional group addition, making it valuable in drug discovery programs targeting cancer and inflammatory diseases. Commonly employed in medicinal chemistry to build complex heterocyclic systems with potential therapeutic activity.