... REFERENCES AND NOTES [1] This paper was presented before the III Convegno Nazionale della Divisione di Chimica Farmaceutica of the Italian Chemical Society, Montecatini Terme, October 18-21 ... [8] AR Katritzky and A. J, Waring, J. Chem. ... Heterocyclic Chem., 4, 523 (1967 ...