1) Amino acid 
Cucurbitin is an amino acid and a carboxypyrrolidine that can eliminate parasitic worms. It is found in Cucurbita seeds. In 1992, a patent was filed to use the (-)-enantiomer in cosmetics and pharmaceuticals. Cucurbitin is found in uncooked pumpkin seeds. Cucurbitin is an inhibitor of histidine decarboxylase, which is associated with inhibition of...