Paper Title
An Investigation into the Formation of Impurity During the Process Development of Sumatriptan Succinate

During the process development of sumatriptan succinate, we have observed the formation of unknown impurity at enhanced level which was identified as a cyclized impurity 7. Present article discussed about the development of robust process for the commercial production of sumatriptan succinate substantially free from impurities. Identification, isolation and characterizations of impurity were also discussed. Keywords: Sumatriptan Impurity, Cyclized Impurity, Indole.