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(Scheme 2) reports the chemical reaction of the PNA back bone module Fmoc protected-[(2-aminoethyl)glycine] tert-butyl ester unit 9, which was received by the reaction of ethylenediamine 6 and chloride acetic acid-tert-butyl ester 7. The reaction product 8 reacts with Fmoc-succinimide to 9.
