Also Called: 2-Naphthalenesulfonic acid, compd. with (1S,2R)-3-(dimethylamino) -2-methyl-1-phenyl-1-(phenylmethyl)propyl propanoate (1:1);2-Naphthalenesulfonic acid, compd. with (1S,2R)-3-(dimethylamino)-2-methyl-1-phenyl-1-(phenylmethyl)propyl propanoate (1:1)