7H-Pyrrolo[2,3-d]pyrimidine,4-chloro-

Also known as 4-chloropyrrolo[2,3-d]pyrimidine or 6-chloro-7-deazapurine (CAS 3680-69-1), this heterocyclic building block is manufactured directly by Chem-Stone (Guangzhou) Co., Ltd., which supplies detailed physical data (molecular weight 153.57, melting point 183-184°C) along with an acute toxicity figure (mouse intraperitoneal LD50 of 297mg/kg). It is sold worldwide across North America, Europe, Asia, the Middle East, and Africa.