(2R,4R)-1-tert-Butyl 2-methyl 4-hydroxypyrrolidine-1,2-dicarboxylate
N-Boc-cis-4-hydroxy-D-proline methyl ester is a non-cleavable ADC linker used in the synthesis of antibody-dr_ug conjugates (ADCs). N-Boc-cis-4-hydroxy-D-proline methyl ester is also a alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs[1