Product ​Name:4-Chloro-7-Tosyl-7H-Pyrrolo[2,3-d]PyrimidineSynonyma: 4-Chloro-7-(4-methylphenylsulfonyl)-7H-pyrrolo[2,3-d]pyrimidineFormula hypothetica: C13H10ClN3O2SMolecular pondus:307.76CAS NO:479633-63-1Usage: Tofacitinib Citrate