Hovetrichosides C−G, Five New Glycosides of Two Auronols, Two Neolignans, and a Phenylpropanoid from the Bark of Hovenia trichocarea

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Abstract
Two 2-hydroxy-2-benzylcoumaranone glycosides, 2,4,6-trihydroxy-2-[(4‘-hydroxyphenyl) methyl]-3(2H)-benzofuranone-4-yl-β-d-glucopyranoside (maesopsin 4-O-glucoside) (1) and 2,4,6-trihydroxy-2-[(4‘-hydroxyphenyl) methyl]-3(2H)-benzofuranone-4-yl-β-d-glucopyranosido-4‘-yl-α-l-rhamnopyranoside (maesopsin 4-O-glucosido 4‘-O-rhamnoside) (2), two neolignan glycosides, 2R-(E)-2,3-dihydro-2-(4‘-hydroxy-3‘-methoxylphenyl)-5-(3‘‘-hydroxy-1‘‘-propenyl)-7-methoxy-3-benzofuranmethanol-4‘-yl-β-d-glucopyranosyl-(1→3)-[β-d-glucopyranosyl-(l→2)]-β-d-glucopyranoside (3) and (threo) 1-(4‘-hydroxy-3‘-methoxy)-2-(4‘‘-hydroxymethyl-2‘‘,6‘‘-dimethoxyphenoxy)-propane-1,3-diol-4‘-yl-β-d-glucopynoside (4), and a phenylpropanoid glycoside, 3-methoxy-5-(2‘-propenyl)-1,2-benzenediol-1-yl-β-d-apiofuranosyl-(1→6)-β-d-glucopyranoside (5) were isolated from the bark of Hovenia trichocarea. Compounds 1−5 were named hovetricosides C−G, respectively, and their structures were established by extensive NMR experiments and chemical methods. Also obtained in this investigation were the known compounds acanthoside B, kelampayoside A, shashenoside I, and 3,4,5-trimethoxyphenol-1-O-β-d-xylopyranosyl-(1→6)-β-d-glucopyranoside.

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