“…Under all of our experimental conditions, at -25, -14, room temperature, 38, and at about 90°, with and without solvent, the formation of compound X was invariant, and at no time were compounds VII, VIII, or IX ever in evidence. In summary the evidence for structure X is (1) correct C, , N analysis, (2) correct molecular weight, (3) correct molar refraction, (4) one active hydrogen per mole of compound, (5) the active hydrogen attached to a nitrogen atom as shown in the infrared spectra for (10) Suggestion from Prof. W. E. von Doering.…”