Forsythoside B

[ (2R,3R,4R,5R,6R) -2-[[ (2R,3R,4R) -3,4-dihydroxy-4- (hydroxymethyl) oxolan-2-yl]oxymethyl]-6-[2- (3,4-dihydroxyphenyl) ethoxy]-5-hydroxy-4-[ (2S,3R,4R,5R,6S) -3,4,5-trihydroxy-6-methyloxan-2-yl]oxyoxan-3-yl] (E) -3- (3,4-dihydroxyphenyl) prop-2-enoate

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