• Korean Journal of Medicinal Crop Science
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• v.7 no.4
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• pp.303-307
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• 1999

Three antioxidative compounds were isolated from the EtOAc extract of the fruits of Pyrus ussuriensis. On the basis of spectroscopic evidences, the structures of these compounds were established as 1, 4-dibenzenediol, chlorogenic acid and quercitrin. The DPPH free radical scavenging activities of 1, 4-dibenzenediol $(RC_{50}\;:\;0.4{\mu}g)$ and chlorogenic acid $(RC_50\;:\;4{\mu}g)$ were more effective than those of BHA $(RC_{50}\;:\;14{\mu}g)$ and a-tocopherol $(RC_{50}\;:\;12{\mu}g)$