The chemical Naproxen has a designated molecular formula of C14H14O3 and a molecular weight of 230.263 g/mol. Synonyms may include: RS-3540, Axer, Bonyl, Calosen, CCRIS 5265, CG 3117, Dysmenalgit N, EINECS 244-838-7, Equiproxen, HSDB 3369, Laraflex, (+)-(S)-6-Methoxy-alpha-methyl-2-naphthaleneacetic acid (ChemID). Naproxen has been assigned a MeSH pharmacological action of: Cyclooxygenase Inhibitor.