'alfa'-Selective glycosylation affords mucin-related GalNAc amino acids and diketopiperazines active on Trypanosoma cruzi - Martins-Teixeira, Maristela B.; Campo, Vanessa L.; Biondo, Monica; Sesti-Costa, Renata; Carneiro, Zumira A.; Silva, João Santana da; Carvalho, Ivone (Bioorganic and Medicinal Chemistry, 2013)