  To investigate1,1-Diphenyl-2-picrylhydrazyl (DPPH) and superoxide radical
(SOR) 17 scavenging activities of 2-oxo-1,2,3,4-tetrahydropyrimidines
derivatives. Free radicals are 18 highly unstable and reactive molecules/atoms.
In the body, free radicals form during 19 normal and abnormal metabolism in the
body and cause serious damage to other 20 biomolecules through generating
oxidative stress (OS). If free radicals induced OS does 21 not neutralized
properly, host multiple pathologies including several types of cancers.
