Prof. Steven L. Castle from Brigham Young University visited our group Date:May 19, 2017 Read times: Dr. Steven L. Castle, visited our group and college of chemistry on May 19, 2017, and gave us a wonderful lecture entitled with New strategies for the synthesis of unusual peptides. PreNews: Prof. Oliver Reiser from University of Regensburg visited our group NextNews: Prof. Ying Cheng from Beijing Normal University visited our group