WITH CARBOXYLIC ACIDS a) A. Kaufmann, Ber., 42, 3482 (1909). b) Beilstein Vol. 9, p. 119. c) M. Bodanszky and V. du Vigneaud, Biochemical preparation Vol. 9, p. 110. d) M. Bodanszky and V. du Vigneaud, J. Am. Chem. Soc., 81, 5688 (1959). e) M. Bodanszky and V. du Vigneaud, ibid., 81, 6072 (1959). f) The reaction was carried out for two hours at room temperature. g) Found: C, 55.88; H, 4.36; N, 10.61. Calcd. for C1sHI7N307: C, 55.81; H, ...