Chemical constituents from n-butanol extract of the stems of Lonicera japonica

Thirteen compounds were isolated from n-butanol extract of the stems of Lonicera japonica.，and were identified as (+)-pinoresinol-4-O-β-D-glucopyranoside ( 1 )，diosmin ( 2 )，quercetin-7-O-β-D-glucopyranoside ( 3 )，uridine ( 4 )，tachioside ( 5 )，caffeic acid-4-O-β-D-glucopyranoside ( 6 )，3，4-O-dicaffeoylquinic acid ( 7 )，grandifloroside ( 8 )，loganic acid ( 9 )，loganin ( 10 )，sweroside ( 11 )，inositol ( 12 )，and glucose ( 13 ). Compounds 8 and 9 were isolated from this plant for the first time，while compounds 1-6 were firstly isolated from the genus Lonicera.