... Vapor chromatography of the esters confirmed the pres- ence of these compounds and also permitted de- (23) A. T. Nielson, Abstracts, American Chemical Society, 132nd (24) (a) AD Walsh, Trans. ... (26) J. H. Brewster, %IS JOURNAL, 76, 6361 (1954). ... 5390 EDWIN I?. ULLMAN ...