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(a) Concentration dependent 2, 2’-Azinobis (3-ethyl benzthiazoline-6-sulphonic acid)+ scavenging pattern of chloroform extract of Piper attenuatum fruits and compounds isolated from the extract (b) Concentration dependent 2, 2-Diphenyl-1-picrylhydrazyl free radical scavenging pattern of piper kadsin A (9)
