Preparative Route to Per-O-acetylated N-Acetyl- and N-(tert-Butoxycarbonyl)neuraminyl-α-(2→3)-galactosyl Disaccharide Glycosyl Donors by Regioselective Acetolysis of Sialyl-α-(2→3′)-lactose - Sherman, Andrei A; Yudina, Olga N; Komarova, Bozhena S; Tsvetkov, Yury E; Iacobelli, Stefano; Nifantiev, Nikolay E (Synthesis, 2005)