A number of thioureas and their phenyl and sulphanilyl13 derivatives are found to possess a definite in vitro antitubercular activity and the outstanding tuberculostatic properties of TV, N'- di-(pn-butoxyphenyl)-thioureas2~ 5) has considerably revived the interest in thioureas derivatives. In view of the findings and the facts that many thiazole derivatives have been found to possess high degree of antitubercular activity, 6 _lo:> the authors have ...