1. For Part X. see K. Esses-Reiter and J. Reiter, J. Heterocyclic Chem ( in press)
2. Presented in part on the Annual Conference of the Hungarian Chemical Society, Szeged (Hungary), 1981 (see. Congress Abstracts, p. 101 ) and on the 8th International Congress of Heterocyclic Chemistry, Graz (Austria), 1981 (see. Congress Abstracts, p. 360)
3. Bicyclic pyrimidine derivatives with a bridgehead nitrogen atom—III
4. see Ref. 1 and the further papers of this series.
5. Structure of Certain Polyazaindenes. V. Syntheses.