关键词:海棠果;化学成分;抗氧化StudyontheChemicalConstituentsofMalusrockiiRehdandItsAntioxidantActivitiesHanzhonghuiDirectedbyprofessorFanjiangpingandQiuminghuaAbstractLijiangcrabapple(MalusrockiiRehd),whicharichtastewithsourandsweet,crisp,juicy,,,,thedifferentpolarextractantsfromcrabapplecrudeextractwereextractedbypetroleumether,chloroform,ethylacetate,n-butylalcohol,,suchasDPPHfreeradicalscavenging,ABTSfreeradicalscavenging,,superoxideanionradicalscavengingcapacitiesofbutanolphaseofcrabapplewereoptimal,±,±,respectively,whiletheABTSfreeradicalandhydroxylradicalscavengingcapacitiesofethylacetatephaseofcrabapplewereoptimal,±,±,,duetotheoptimumextractionofbutanolphaseofcrabapple,,,bothoffraction1andfraction2at1mg/mL,theDPPHradicalscavengingandABTSradicalwereover90percentandtheirvaluesofEC50highest,therewasnosignificantdifference(P>).Finally,poundscouldbeisolatedfrombutanolphaseofcrabappleusingseveralmodernseparatedtechnologies,suchassilicagelcolumnchromatography,sephadexL-20,,identifiedbyaseriesofspectroscopicanalysisincludingNMR,MS,wereasfollows:-(-)Epicatechin(01),Naringinendihydrochalcone(02),Auri
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