Studies On The Chemical Constituents Of Caesalpinia Digyna Rottler

Forty-two compounds were isolated from the ethanol extract of Caesalpinia digyna by means of column chromatography（Sephadex LH-20,ODS,MCI and silica gel,etc）.The structures of these compounds were identified on the basis of spectroscopic analysis(HR-ESI-MS,~1H-NMR,¹³C-NMR,DEPT,HSQC and HMBC,etc).The compounds were:caesalpinflavan E（1）,caesalpinflavan D（2）,caesalpinflavan B（3）,caesalpinflavan A（4）,caesalpinnone A（5）,oxyfadichalcone B（6）,2′,4′-dihydroxy-3′-（2′′-hydroxybenzyl）chalcone（7）,2′,4′-dihydroxy-5′-（2′′-hydroxybenzyl）chalcone（8）,2′,4′-dihydroxychalcone（9）,isoliquiritigenin（10）,3-deoxysappanchalcone（11）,butein（12）,1-（2’-carboxyallyl）-2,3,7-trimethoxydibenzo[b,d]furan（13）,mimosol G（14）,isobonducellin（15a）,bonducellin（15b）,isointricatinol（16a）,intricatinol（16b）,7-hydroxy-3-（4′-hydroxybenzylidene）Chroman-4-one（17）,7-hydroxy-3-（3’,4’-dihydroxybenzylidene）chroman-4-one（18）,caesalpinflavan F（19）,7-hydroxy flavanone（20）,pinocembrin（21）,liquiritigenin（22）,naringenin（23）,butin（24）,kaempferol（25）,quercetin（26）,kaempferol-3-O-α-L-rhamnopymnoside（27）,quercetin-3-O-α-L-rhamnopyranoside（28）,clemaphenol A（29）,syringaresinol（30）,medioresinol（31）,ursolic acid（32）,3β-hydroxylup-20（29）-en-28-oic acid（33）,β-sitosterol（34）,3-hydroxybenzyl benzoate（35）,resorcinol（36）,2-hydroxybenzoic acid（37）,vanillin（38）,ethyl gallate（39）and gallic acid（40）.Except for compounds 15a,15b,16a,16b,20,22,23,26,32,34,39 and 40,the other 30 compounds were isolated from Caesalpinia digyna for the first time.