1) Its Heterocycles
2) Please mention title and authors.
Studies on Pyridazine Compounds, XIV. Cyclization of Pyridazinylhydrazones
Géza Szilágyi, Márta Sóti, Péter Mátyus, and Endre Kasztreiner
hm, you could just correct it in first message. without putting +++ to the title.
Persons who have access to Heterocycles would help you but now your topic looks "satisfied and closed".