Epimedin B

3-[ (6-Deoxy-2-O-β-D-xylopyranosyl-α-L-mannopyranosyl) oxy]-7- (β-D-glucopyranosyloxy) -5-hydroxy-2- (4-methoxyphenyl) -8- (3-methyl-2-bute n-1-yl) -4H-1-benzopyran-4-one

C[C@H]1[C@@H] ([C@H] ([C@H] ([C@@H] (O1) OC2=C (OC3=C (C2=O) C (=CC (=C3CC=C (C) C) O[C@H]4[C@@H] ([C@H] ([C@@H] ([C@H] (O4) CO) O) O) O) O) C5=CC=C (C=C5) OC) O[C@H]6[C@@H] ([C@H] ([C@@H] (CO6) O) O) O) O) O