To investigate the non-alkaloidal chemical constituents of the stems and leaves of Melodinus suaveolens and their antibacterial activities. Compounds were isolated and purified by repeated silica gel, Sephadex LH-20, ...To investigate the non-alkaloidal chemical constituents of the stems and leaves of Melodinus suaveolens and their antibacterial activities. Compounds were isolated and purified by repeated silica gel, Sephadex LH-20, RP18, and preparative HPLC. Their structures were elucidated by comparison with published spectroscopic data, as well as on the basis of extensive spectroscopic analysis. The antibacterial screening assays were performed by the dilution method. Fourteen compounds were isolated, and identified as lycopersene(1), betulinic aldehyde(2), 3β-acetoxy-22,23,24,25,26,27-hexanordammaran-20-one(3), 3a-acetyl-2, 3, 5-trimethyl-7ahydroxy-5-(4,8,12-trimethyl-tridecanyl)-1,3a,5,6,7,7a-hexahydro-4-oxainden-1-one(4), 3β-hydroxy-28-norlup-20(29)-ene-17β-hydroperoxide(5), 3β-hydroxy-28-norlup-20(29)-ene-17α-hydroperoxide(6), β-sitosterol(7), 28-nor-urs-12-ene-3β, 17β-diol(8), α-amyrin(9), ergosta-4,6,8(14),22-tetraen-3-one(10), 3β-hydroxy-urs-11-en-28,13β-olide(11), betulin(12), obtusalin(13), and ursolic acid(14). Among the isolates, compounds 1, 2, 6, 8, 10, and 14 showed potent antibacterial activities against the four bacteria. This is the first report of the antibacterial activity of the constituents of Melodinus suaveolens.展开更多
Comprehensive Summary,Compounds 1—12,including seven complex monoterpenoid indole-quinoline and bisindole alkaloids,suadimins D—J(1—7)with previously unreported carbon-carbon linkages,were isolated and identified f...Comprehensive Summary,Compounds 1—12,including seven complex monoterpenoid indole-quinoline and bisindole alkaloids,suadimins D—J(1—7)with previously unreported carbon-carbon linkages,were isolated and identified from the twigs and leaves of Melodinus suaveolens.Their structures were elucidated by a combination of diverse methods,especially the extensive spectroscopic data analysis and electric circular dichroism(ECD)calculations.The cytotoxicity of these compounds against three cancer cell lines was evaluated,some of which showed moderate activities with IC50 values ranging from 2.4 to 8.0μM.展开更多
基金suppoted by the Natural Science Foundation of China(No.81225024)the National Science and Technology Support Program of China(No.2013BAI11B02) for partial financial support
文摘To investigate the non-alkaloidal chemical constituents of the stems and leaves of Melodinus suaveolens and their antibacterial activities. Compounds were isolated and purified by repeated silica gel, Sephadex LH-20, RP18, and preparative HPLC. Their structures were elucidated by comparison with published spectroscopic data, as well as on the basis of extensive spectroscopic analysis. The antibacterial screening assays were performed by the dilution method. Fourteen compounds were isolated, and identified as lycopersene(1), betulinic aldehyde(2), 3β-acetoxy-22,23,24,25,26,27-hexanordammaran-20-one(3), 3a-acetyl-2, 3, 5-trimethyl-7ahydroxy-5-(4,8,12-trimethyl-tridecanyl)-1,3a,5,6,7,7a-hexahydro-4-oxainden-1-one(4), 3β-hydroxy-28-norlup-20(29)-ene-17β-hydroperoxide(5), 3β-hydroxy-28-norlup-20(29)-ene-17α-hydroperoxide(6), β-sitosterol(7), 28-nor-urs-12-ene-3β, 17β-diol(8), α-amyrin(9), ergosta-4,6,8(14),22-tetraen-3-one(10), 3β-hydroxy-urs-11-en-28,13β-olide(11), betulin(12), obtusalin(13), and ursolic acid(14). Among the isolates, compounds 1, 2, 6, 8, 10, and 14 showed potent antibacterial activities against the four bacteria. This is the first report of the antibacterial activity of the constituents of Melodinus suaveolens.
基金financial support from the National Natural Science Foundation of China(Nos.22007095 and 82293685)the CAMS Innovation Fund for Medical Sciences(2019-12M-5-080)the Biological Resources Program,CAS(KFJ-BRP-008-001)is gratefully acknowledged.
文摘Comprehensive Summary,Compounds 1—12,including seven complex monoterpenoid indole-quinoline and bisindole alkaloids,suadimins D—J(1—7)with previously unreported carbon-carbon linkages,were isolated and identified from the twigs and leaves of Melodinus suaveolens.Their structures were elucidated by a combination of diverse methods,especially the extensive spectroscopic data analysis and electric circular dichroism(ECD)calculations.The cytotoxicity of these compounds against three cancer cell lines was evaluated,some of which showed moderate activities with IC50 values ranging from 2.4 to 8.0μM.
