2-sulfanylidene-1H,2H,3H,4H-pyrido[3,4-d]pyrimidin-4-one; CAS No.: 412341-42-5; 2-sulfanylidene-1H,2H,3H,4H-pyrido[3,4-d]pyrimidin-4-one. As a chemical online store, ChemShuttle provides a diverse array of chemical building blocks, including the 2-sulfanylidene-1H,2H,3H,4H-pyrido[3,4-d]pyrimidin-4-one. This compound is a valuable key intermediate in the synthesis of certain pharmaceuticals. The company s library of compounds contains numerous examples of such building blocks for drug discovery. By offering custom synthesis services, ChemShuttle can create similar heterocycles tailored to specific research requirements. As a worldwide chemical supplier, ChemShuttle ensures the availability of high-quality chem blocks like the 2-sulfanylidene-1H,2H,3H,4H-pyrido[3,4-d]pyrimidin-4-one to scientists and researchers across the globe.