CHN C1 a Greenstein, JP, and Winitz, M.," Chemistry of the Amino Acids." Vol. 2, p. 810.(John Wiley: Sew York 1961.) for a monohydrate was then treated with nitrosyl chloride in formic acid. After work-up, the product gave a single spot on t. 1. c. and the stability of the peptide bonds under these reaction conditions was confirmed by the absence of any ninhydrin-positive spots on chromatograms of the crude material. Confirmation of the ...
