Turn Conformation of β-Amino Acid Based Short Peptides Promoted by an Amidothiourea Moiety at C-Terminus - Zhang, Yanhan; Yan, Xiaosheng; Cao, Jinlian; Weng, Peimin; Miao, Daiyu; Li, Zhao; Jiang, Yun-Bao (Journal of Organic Chemistry, 2020)