Andrographidine A is a natural product for research related to life sciences.

This is amino acids 86 to 100 fragment of class II-associated invariant chain peptide called CLIP. The major histocompatibility complex class II molecule displays peptide fragments of foreign proteins to trigger a defensive reaction from the immune system. Before insertion of the foreign peptides into the binding groove, a place-holding peptide CLIP is removed. This is accomplished by the molecule DM, which is shown to increase the dissociation rate of a CLIP peptide from class II.

Antho-Rwamide II is a neuropeptide that can be isolated from the sea anemone Anthopleura elegantissima. Antho-Rwamide II can induce contraction of the endothelial muscles of the sea anemone and participate in neurotransmission. Antho-Rwamide II can be used to explore the function of the nervous system in invertebrates.