1. Free Radicals in Biology and Medicine;Halliwell,1989
2. The chemistry of acid derivatives;Nicolaides,1992
3. 1,2,4-Oxadiazoles;Clapp,1976
4. Five-membered rings with two or more oxygen, sulfur or nitrogen atoms;Clapp,1984
5. Five-membered rings with more than two heteroatoms and fused carbocyclic derivatives;Jochims,1996