Fig. 3. Synthesis of a complex DKP-terminated library.

(a) Left: General structure of the library. Middle: Structures of the five different main chain diversity elements used at second position of the library, Right: DKP units employed as a capping group in the library. (b) Top-left: MS of 11 ([MNa+] = 1241.6) obtained after CNBr-mediated cleavage from a single bead picked from the library. Top-right: Structure of the peptoid identified after MALDI-TOF based sequencing; Bottom: MS/MS of 11 (from fragmentation of 1241.6 ion).