《Table 1 Chromone derivatives isolated from A.sinensis》

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《白木香化学成分及其药理作用与质量控制的研究进展（英文）》

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Chromone（or 1，4-benzopyrone），a structural isomer of coumarin，is a derivative of benzopyran with a substituted keto group on the pyran ring.Previous studies showed that 2-（2-phenylethyl）chromone type compounds were the characteristic chemical constituents of the resinous wood of A.sinensis[24].YANG et al.isolatedthirty-seven2-（2-phenylethyl）chromone derivatives（1-37）from the resinous wood，petioles and leaves of A.sinensis[2，8，9，17，22，25-29].Two new2-（2-phenylethyl）chromones whose protons at C8were both substituted by Cl-atoms，namely8-chloro-6-hydroxy-2-（2-phenylethyl）chromen-4-one（38）and 8-chloro-6-hydroxy-2-[2-（4-methoxyphenyl）-ethyl]chromen-4-one（39），were obtained from the resinous part of the herb[30].QUAN et al.reported the isolation of the first 2-（2-phenylethyl）chromone glycoside，aquilarinoside C（40），from A.senessis[31].In addition，a 2-（2-phenylethenyl）chromone，namely6-hydroxy-2-[2-（40-hydroxy-30-methoxyphenyl）ethe nyl]chromone（41），were isolated from the ethanolic extract of A.sinensis[22].The isolation，purification，andstructureelucidationoftwenty-five tetrahydro-2-（2-phenylethyl）chromones from the resinous part of A.sinensis were reported（42-67）[20，26，27，29，32，33].Li wei et al.isolated six epoxy-tetrahydro-2-（2-phenylethyl）chromones with only one epoxy group（68-73），along with three diepoxy-tetrahydro-2-（2-phenylethyl）chromones（74-76）[8，9].Two optical chromone enantiomers（77-78）with a chiral center at C-7’were isolated from the EtOAc extract of A.sinensis by using subsequent chiral HPLC on a CHIRAPAK IC column[9].YARURA et al.isolated twenty-two dimeric chromones（79-96），including four pairs of enantiomers（85a/85b，87a/87b，90a/90b，92a/92b）from MeOH extract of withered wood of A.sinensis[27，34，35].In conclusion，over one hundred chromone derivatives in total have been isolated and identified from A.sinensis.Their structures and chemical names were showed in figure 1 and table 1，respectively.