Corporation in defraying a part of the cost of this study. Summary The absorption spectra of six p-substituted acetophenone azines and of 2-thienyl methyl ketazine were determined. 'The results of this study lead to the interpretation of the hypso- ... [ CCXTRIBUTION FROM THE WARNER INSTITUTE FOR THERAPEUTIC RESEARCH] ... The search for improved muscle-relaxing drugs led to the preparation of a number of 3-(alkoxy- phenoxy)-l,2-propanediols in these ...