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A new cembrane-type diterpene, 11,12-epoxy-sarcophytoxide ( 1 ), along with five related diterpenoids ( 2 , and 4 - 7 ), has been isolated from the soft coral Lobophytum sp. The structure of the new compound 1 was elucidated on the basis of detailed analysis of its spectroscopic data, and by...
A convenient method for the synthesis and enantiomeric resolution of ( ± )-pinocembrin has been developed. This route involves the hydrogenation of 5,7-dihydroxyflavone, the derivatization of racemic pinocembrin with chiral amine, and the separation of the diastereoisomers due to their different...
The total synthesis of racemic 3-(4'-methoxybenzyl)-7,8-methylenedioxy-chroman-4-one, a homoisoflavanone with antimycobacterial activity isolated recently from Chlorophytum inornatum , was described. During this research, the first approach for the conversion of homoisoflavonoids into...
Two novel thiophenes, grijisyne A ( 1 ), and grijisone A ( 2 ), were isolated from the crude ethanolic extract of the roots of Echinops grijissi Hance. Their structures were determined by spectral methods, especially 2D NMR spectra. All the isolated compounds were tested for their anti-tumor...
A new acyclic guanidine alkaloid, canarosine ( 1 ), together with five known compounds, β-sitosterol ( 2 ), stigmasterol ( 3 ), daucosterol ( 4 ), epi -inositol 6- O- methyl ether ( 5 ), and rutin ( 6 ), were isolated from the aerial parts of Canavalia rosea . Their structures were established...
Two new transformed sesquiterpenes of alantolactone by Mucor polymorphosporus were obtained. They were characterized as 3β-hydroxy-11βH-eudesm-5-en-8β,12-olide ( 2 ) and 3β,11 -dihydroxy-eudesm-5-en-8β,12-olide ( 3 ), on the basis of spectral methods including 2D NMR. And product 3 was an...
Two new ent -labdane diterpenoid glycosides were isolated from the aerial parts of Andrographis paniculata . Their structures were elucidated as 3- O -β- d -glucosyl-14-deoxyandrographiside ( 1 ) and 3- O -β- d -glucosyl-14-deoxy-11,12-didehydroandrographiside ( 2 ) by means of 1D and 2D NMR...
Two new isoflavanones, 5,3'-dihydroxy-4'-methoxy-5'-(3-methyl-1,3-butadienyl)-2'',2''-dimethylpyrano5,6:6,7isoflavanone ( 1 ) and 5,3'-dihydroxy-5'-(3-hydroxy-3-methyl-1-butenyl)-4'-methoxy-2'',2''-dimethylpyrano5,6:6,7isoflavanone ( 2 ), together with two known isoflavonoids, cristacarpin, and...
Two new triterpenoid saponins, loniceroside D ( 1 ) and loniceroside E ( 2 ), were isolated from the dry flowers and buds of Lonicera japonica Thunb., along with seven known compounds, chlorogenic acid ( 3 ), sweroside ( 4 ), vogeloside ( 5 ), epi -vogeloside ( 6 ), loniceroside A ( 7 ),...
A novel alkaloid, hupcrispatine ( 1 ), has been isolated from the unique Chinese species Huperzia crispate Ching. The structure of hupcrispatine has been elucidated as 9-amino-6-methyl-3-quinolone on the basis of spectral evidence.
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