Triprenylated derivative

The majority of chalcones are monoprenylated with a few di-/triprenyl derivatives, all of which involve positions 3 >5 >5>3>2. About one-third of the... 

Almost half of the isoflavonoids identified from the Leguminosae, in which prenylated isoflavones constitute >50% of the total (pterocarpanoids, rotenoids, isoflavanones, isoflavans, coumestans, 3-arylcoumarins, and coumaronochromones), exhibit a high degree of structural diversity and complexity of prenylation.8,86"148 More than half of the isoflavones are monoprenylated, whereas 40% are diprenylated, and very few are triprenyl derivatives, with prenylation at positions 6>8>3 5 >6,>2 and O-methylation at 4 >7=6=2 =3 >5 =5>8. A number of novel isoflavonoid structures with rare skeletons, as well as complex isoflavone O- and C-glycosides have recently been reported.8,148... 

The great majority of prenylated dihydroflavonols are of the 2R,3R configuration, and only a few have the 2R,3S cofiguration, with prenylation at positions 8>6>6,7>7,8>3 and rare substitutions at other B-ring positions.149 About one-third of the compounds are (/-methylated at positions 5>4 >7=3. Prenylated flavonols, on the other hand, have a significant proportion of furano- and dimethylchromeno side attachments, but with a few di- and triprenyl derivatives, with prenylation at positions 8>6>4 >3 however, alkylation at both A and B rings is... 

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