Fmoc-Gly-Gly-L-Phe-N-[(Cbz-estermethoxy)methyl]Glycinamide (also known as "Fmoc-Gly-Gly-Phe-Gly-NH-CH?-O-CH?COOH") is a Fmoc and Cbz protected protease-cleavable ADC linker featuring the GGFG (Gly-Gly-Phe-Gly) sequence. The Fmoc group can be removed under basic conditions to yield a free amine for further conjugation. The Cbz protecting group can be removed via hydrogenolysis to form a free amine.
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