Levovirin (L-Ribavirin), the L-enantiomer of ribavirin, is a guanosine nucleoside analog with immunomodulatory activity and is used in the study of hepatitis C virus infection.

TAT TFA (YGRKKRRQRRR) is derived from human immunodeficiency virus (hiv-1) transcription reverse activator TAT, is a cell penetrating peptide.

Dynorphin A (1-8) 是胎盘组织提取物中主要的阿片肽。Dynorphin A (1-8) 是 kappa 受体最可能的天然配体。Dynorphin A (1-8) 抑制 3H-Bremazocine 与纯化的 kappa 受体的结合 (IC50=303 nM)。