Nicotredole (Tryptamide) is an orally active anti-inflammatory and analgesic agent. Nicotredole exhibits evident antiinflammatory effects of potency comparable with Phenylbutazone. Nicotredole has only weak ulcerogenic activity.

C-Peptide, dog is a component of proinsulin, released from pancreatic beta cells into blood together with insulin. The C-peptide of proinsulin is important for the biosynthesis of insulin but has for a long time been considered to be biologically inert.

A biogenic polyamine formed from spermidine. It is found in a wide variety of organisms and tissues and is an essential growth factor in some bacteria.