tert-butyl 3-formyl-1H-pyrrolo[2,3-b]pyridine-1-carboxylate; CAS No.: 144657-66-9; tert-Butyl pyrrolopyridine carboxylate combines protective groups with fused heterocycles for kinase inhibitor synthesis. The formyl group at C3 enables click chemistry modifications. ChemShuttle, as a chemical synthesis company, provides these advanced intermediates for structure-based drug design in oncology research.