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Use of diaminobenzoic acid linker (Dbz) as safety‐catch linker for peptide thioester Fmoc SPPS. (i) SPPS; (ii) 4‐nitrochloroformate; (iii) DIPEA; (iv) standard TFA cleavage; (v) R‐SH, NaSPh; (vi) 6 M guanidine, phosphate buffer pH 7.8, 1% thiophenol.
