Adenosine 5'-(trihydrogen diphosphate). An adenine nucleotide containing two phosphate groups esterified to the sugar moiety at the 5'-position.

Proctolin is a bioactive neuropeptide that modulates interneuronal and neuromuscular synaptic transmission in a wide variety of arthropods.

Nesbuvir is a selective hepatitis C virus (HCV) nonstructural protein 5B (NS5B) RNA-dependent polymerase inhibitor.