The story
From oselt- (of unknown origin) + -amivir (“neuraminidase inhibitor”).
Etymology from Wiktionary, CC BY-SA 4.0.
oseltamivir
Today it means: An antiviral drug that is taken orally in the form of its phosphate C₁₆H₂₈N₂O₄·H₃PO₄ and is a neuraminidase inhibitor used in the treatment and prevention of influenza. It is a derivative of shikimic acid, and is marketed as Tamiflu. Full definition →