2-Naphthalenesulfonic acid compound with (-)-alpha-(2-(dimethylamino)-1-methylethyl)-alpha-phenylphenethyl propionate (1:1) monohydrate 2-Naphthalenesulfonic acid, compd. with (-)-alpha-4-(dimethylamino)-3-methyl-1,2-diphenyl-2-butanol propionate (1:1), monohydrate 55557-30-7 5667-69-6 7247-77-0 Benzeneethanol, alpha-(2-(dimethylamino)-1-methylethyl)-alpha-phenyl-, propanoate (ester), (R-(R*,S*))-, compd. with 2-naphthalenesulfonic acid (1:1), monohydrate Levopropoxyphene 2-naphthalenesulfonate hydrate Levopropoxyphene napsylate Levopropoxyphene napsylate [USAN] Levopropoxyphene napsylate hydrate