Podda, Gianni; Fadda, Anna Maria; Maccioni, Anna Maria; Pelli, Beatrice; Traldi, Pietro Journal of Heterocyclic Chemistry, 1986 , vol. 23, # 3 p. 905 - 912 Journal of Heterocyclic Chemistry, 1986 , vol. 23, # 3 p. 905 - 912