• Sikazwe, D., et al.: Bioorg. Med. Chem., 17, 1716 (2009)
• Stump, C., et al.: Bioorg. Med. Chem. Lett., 19, 214 (2009)
• Glycosylation at the pyrrole nitrogen has been carried out under phase-transfer conditions to give nucleoside analogues: Heterocycles, 29, 795 (1989).
• For a review of the chemistry of azaindoles, see: Russ. Chem. Rev., 49, 428 (1980).