An Effective Sialylation Method Using N-Troc- and N-Fmoc-protected β-Thiophenyl Sialosides and Application to the One-pot Two-step Synthesis of 2,6-Sialyl-T Antigen - Adachi, Masaatsu; Tanaka, Hiroshi; Takahashi, Takashi (Synlett, 2004)