01186nam2-2200313li-450 99000018638020331620180312154900.00018638USA010018638(ALEPH)000018638USA01001863820001109d1984----km-y0itay0103----baengGBFive-membered rings with two or more oxygen, sulfur or nitrogen atomseditor Kevin T. PottsPt. 4BXIV, 1170 p00100186252001Comprehensive heterocyclic chemistrythe structure, reactions, synthesis and uses of heterocyclic compoundschairman of the editorial board Alan R. Katritzky, co-chairman of theeditorial board Charles W. ReesPotts,Kevin T.91297Sistema bibliotecario di Ateneo dell' Università di SalernoRICA990000186380203316547.59 COM 6/4B0012798BKSCI1991101120001110USA01171320020403USA011626PATRY9020040406USA011613Five-membered rings with two or more oxygen, sulfur or nitrogen atoms95152UNISA