S34 Power of Natural Products 2 S34-1 Study on the structures and biosynthetic pathway of indole alkaloids, notoamides S34-2 Variety of marine natural products experience S34-3 Isolation, structure elucidatin, and total syntheses of novel alkaloids in Lycopodium serratum Thunb S34-4 Structural basis of the biological activity of tannins and related polyphenols S34-5 Search for medicinal seeds from natural products based on cell-based assay S34-6 What is the motivation of your study on marine natural products?