Somatostatin (GHIH), a peptide hormone, regulates the endocrine system and affects neural transmission and cell proliferation by interacting with G-protein-coupled somatostatin receptors and inhibiting the release of multiple secondary hormones. Somatostatin inhibits secretion of insulin and glucagon.

Corypalmine is a kind of alkaloid from Coptis chinensis and purple chinensis, which has inhibitory effect on the germination of plant pathogenic spores and saprophytic fungi.

Methyl caffeate acid.