Comment: Otilimab (MOR103, GSK3196165) is a clinical stage fully human IgG1λ antibody that targets the granulocyte-macrophage colony-stimulating factor (GM-CSF; CSF2). It is being investigated as a therapeutic for inflammatory diseases. MOR103 was developed using MorphoSys’ HuCAL® technology, and has been fully out-licensed otilimab to GSK. MOR103 is claimed as MOR-04357 in patent WO2006122797A2 (by BLAST peptide sequence matching).
Comment: Favipiravir (T-705) is an orally delivered, guanine (purine) analogue antiviral drug (cf. remdesivir which is administered i.v.). It targets viral RNA-dependent RNA polymerase (RdRP) of RNA viruses and since the catalytic domain of RdRP is well conserved across species, has a broad-spectrum of activity; although Furuta et al. (2002) reported that actvity was weak against non-influenza virus RNA viruses . Favipiravir was originally identified through a chemical library screen against influenza virus RdRP . Chemically, it is a prodrug. In human cells it undergoes phosphoribosylation and phosphorylation to its active form, favipiravir-ribofuranosyl-5′-triphosphate (F-RTP). F-RTP is bound by the RdRP, but it blocks enzyme activity and so terminates chain elongation [5-6].
IUPAC Name: 5-fluoro-2-oxo-1H-pyrazine-3-carboxamide