Figure 2.
Chemical structures of the compounds.
| Icariside II | R1 = H | R2 = rha |
| Icariin | R1 = glc | R2 = rha |
| Epimedin A | R1 = glc | R2 = rha-glc |
| Epimedin B | R1 = glc | R2 = rha-xyl |
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