Definition: Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.
tolrestat [ AY 27773,AY-27,773,N-((5-(trifluoromethyl)-6-methoxy-1-naphthalenyl)thioxomethyl)-N-methylglycine,N-5-trifluoromethyl-6-methoxy-1-thionaphthoyl-N-methylglycine ] RN & structure given in first source