6-Chloro-3-hydroxypyrazine-2-carboxamide is an intermediate for favipiravir.

Molnupiravir is an orally bioavailable form of a highly potent ribonucleoside analog that inhibits the replication of multiple RNA viruses including SARS-CoV-2, the causative agent of COVID-19.

MK-5172 is a P2-P4 quinoxaline macrocyclic HCV NS3/4a protease inhibitor currently in clinical development.

TAPI-2 is a broad-spectrum inhibitor of matrix metalloprotease (MMP), tumour necrosis factorα-converting enzyme (TACE) and a disintegrin and metalloproteinase (ADAM), with an IC50 of 20±10 μM for MMP.

Azelastine is a potent, second-generation, selective, histamine antagonist.

Quipazine Dimaleate is a selective 5-HT3 receptor agonist.

4'-O-Methylbavachalcone is a chalcone isolated from Psoralea corylifolia, which can inhibit severe acute respiratory syndrome coronavirus (SARS-CoV) papain-like protease (PLpro) activity, with an IC50 of 10.1 μM

EIDD-2801 is an orally bioavailable prodrug of EIDD-1931, which has a broad-spectrum antiviral activity against 39 multiple coronaviruses, including SARS-CoV2, MERS-CoV, SARS-CoV. and related zoonotic group 2b or 2c Bat-CoVs, as well as increased potency against a coronavirus bearing resistance mutations to another nucleoside analog inhibitor.

ALC-0315, a cationic lipid, is a potent siRNA delivery vehicle. It can be used to form LNPs.