Chromogranin A (324-337), human is a peptide fragment of chromogranin A, it can be isolated from human ileal carcinoid tumor. Chromogranin A is a soluble glycoprotein stored with hormones and neuropeptides in secretory granules of most (neuro)endocrine cells and neurons, and it is also a plasma marker of neuroendocrine tumors.

16a17a-Epoxy-4-Pregnen-320-Dione is a chemical compound.

Tyroserleutide TFA, isolated from the degradation products of porcine spleen, is a small molecular tripeptide which inhibits tumor growth both in vitro and in vivo.