Fig. 2

The structures of major compounds. C5: Kaempferol, C6: Epigallocathechin gallate, C7: Ferulic acid, C8: Cathechin, C9: Caffeic acid, C11: Vanilic acid.

The structures of major compounds. C5: Kaempferol, C6: Epigallocathechin gallate, C7: Ferulic acid, C8: Cathechin, C9: Caffeic acid, C11: Vanilic acid.