8718. Sophorabioside

Nomenclature

CAS number: 2945-88-2
3-[4-[[2-O-(6-Deoxy-α-l-mannopyranosyl)-β-d-glucopyranosyl]oxy]phenyl]-5,7-dihydroxy-4H-1-benzopyran-4-one; genistein-4′-glucosidorhamnoside.
C27H30O14; mol wt 578.52.
C 56.05%, H 5.23%, O 38.72%.

Description and references

From fruits of Sophora japonica L., Leguminosae. Isoln and structure: Zemplén, Bognár, Ber. 75B, 482 (1942). The biose is not identical with rutinose.

Chemical structure

Properties

The anhydr substance mp 248° (slight decompn). [α]D19 73° (0.27 g in 10 ml pyridine). Freely sol in pyridine; sol in hot alcohol, hot acetone; slightly sol in boiling water. The alcoholic soln gives a purple color with ferric chloride.

Derivative

Trihydrate.

Properties

Needles from dil alcohol, mp 156-160°. The water of crystn can be removed by drying at 100° over P2O5 in vacuo for 12 hours.