4-Chloro-5H-pyrrolo[2,3-d]pyrimidin-6 (7H) -one

4-Chloro-5H-pyrrolo[2,3-d]pyrimidin-6 (7H) -one , with CAS No. 346599-63-1, is a fragment molecule that serves as an important scaffold for molecular linking, expansion, and modification. 4-Chloro-5H-pyrrolo[2,3-d]pyrimidin-6 (7H) -one provides a structural basis and research tool for the design and screening of novel drug candidates, and is commonly used in drug discovery, drug synthesis, and related research.