Epimedin C

3-[ (6-Deoxy-2-O- (6-deoxy-a-L-mannoppyranosyl) -a-L-mannopyranosyl) oxy]-7- (b-D-glucopyranosyloxy) -5-hydroxy-2- (4-methoxyphenyl) -8- (3-m ethyl-2-buten-1-yl) -4H-1-benzopyran-4-one

C[C@H]1[C@@H] ([C@H] ([C@H] ([C@@H] (O1) O[C@@H]2[C@@H] ([C@H] ([C@@H] (O[C@H]2OC3=C (OC4=C (C3=O) C (=CC (=C4CC=C (C) C) O[C@H]5[C@@H] ([C@H] ([C@@H] ([C@H] (O5) CO) O) O) O) O) C6=CC=C (C=C6) OC) C) O) O) O) O) O