Parexel International Corp. has signed a long term lease for 13,000 square feet at the newly renovated Class A office building at 750 East Main Street, Stamford, CT.  The Waltham, Mass. based company conducts clinical trials on behalf of pharmaceutical companies. Parexel will relocate to their new location in downtown Stamford from 181 Harbor Drive.  Brett A. Sherman of Angel Commercial, LLC represented Parexel in their lease negotiations.