Levulinic acid derived from the degradation of cellulose is a precursor for the synthesis of biofuels such as ethyl levulinate.

Xenopsin(2TFA) is a neurotensin-like octapeptide?previously isolated from amphibian skin.The octapeptide xenopsin, previously isolated from amphibian skin, stimulates exocrine pancreatic secretion of bicarbonate and protein in conscious dogs and increases the volume of secretion.

Amylin (8-37), rat is a truncated analog of native Amylin that selectively inhibits insulin-related glucose uptake and glycogen deposition in muscle tissue. Amylin is also known as islet amyloid precursor peptide (IAPP) and is co-secreted with insulin from pancreatic β-cells.