Heterocycles of biological importance: Part 6. The formation of novel biologically active pyrimido[1,2-a]benzimidazoles from electron deficient alkynes and 2-aminobenzimidazoles - Wahe, Helene; Asobo, Peter F.; Cherkasov, Rafael A.; Nkengfack, Augustin E.; Folefoc, Gabriel N.; Fomum, Zacharias T.; Doepp, Dietrich (ARKIVOC, 2003)
doi: 10.3998/ark.5550190.0004.e16