Acknowledgment.-The authors desire to ex- Press their appreciation to Dr. Randolph T. Major of Merck and Co., Rahway, N. J.9 for the establishment of a “Merck Medicinal Research Fellowship” which made the research presented in this communication possible. ... Summary A number of new functional derivatives ;ts well as substitution products of 5-methyl-thiazoline- m-cresol have been described, EASTON, PA. NEW YORK, N. Y. ...