In the course of this work a number of N-(p-nitrobenzoy1)-amino acids and N-(p- aminobenzoyl)-amino acids were prepared which have not been reported in the literature. Data on these compounds are given in Tables I and 11. The biological properties of these pteroylglutamic acid derivatives have been examined by Dr. ELR Stokstad and Dr. BL Hutchings of the Lederle Laboratories Division, American Cyanamid Company, Pearl ...