5-Hydroxyindole, a hydroxylated indole, can be found in a vast array of pharmacologically active agents and natural products. 5-Hydroxyindole slows desensitization of the 5-HT3 receptor-mediated ion current in N1E-115 neuroblastoma cells.

[Tyr11]-Somatostatin is a neuroavtive peptide for proteomics research. Somatostatin is one of many neuroactive substances that influence retinal physiology.

L-Erythrulose (L-glycero-Tetrulose) is a ketose extracted from sugar cane that has tanning and moisturizing effects and is often added to skin care products.