levopropoxyphene napsylate
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Levopropoxyphene — IUPAC name (1R,2S) 1 benzyl 3 (dimethylamino) 2 methyl 1 phenylpropyl propionate … Wikipedia
levopropoxyphene — le·vo·pro·poxy·phene .lē və .prō päk si .fēn n a drug used esp. in the form of its napsylate C22H29NO2·C10H8SO3 as an antitussive … Medical dictionary