Bis-PEG2-PFP ester is a non-cleavable 2-unit polyethylene glycol (PEG) linker employed in the synthesis of antibody-drug conjugates (ADCs) [1]. Additionally, Bis-PEG2-PFP ester serves as a PEG-based linker for the synthesis of proteolysis targeting chimeras (PROTACs) [2].

Bis-PEG2-endo-BCN is a two-unit cleavable polyethylene glycol (PEG) linker employed in the synthesis of antibody-drug conjugates (ADCs)[1].

Propargyl-PEG3-NHS ester, a cleavable ADC linker, is utilized in the synthesis of antibody-drug conjugates (ADCs)[1].

Fmoc-NH-PEG6-CH2COOH is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs) [1].

Boc-Gly-Gly-Phe-Gly-OH is a self-assembling tetrapeptide with N- and C-protection.

Mal-amido-PEG10-C2-NHS ester is a noncleavable antibody-drug conjugate (ADC) linker that consists of a maleimide group and an N-hydroxysuccinimide (NHS) ester. The NHS ester enables efficient labeling of primary amines (-NH2) in proteins, amine-modified oligonucleotides, and other amine-containing molecules[1][2].

m-PEG4-Amine is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs)[1].

Aminooxy-PEG2-alcohol is a non-cleavable PEG linker consisting of two units, utilized in the synthesis of antibody-drug conjugates (ADCs) [1]. This compound serves as a PEG-based PROTAC linker for the synthesis of PROTACs as well [2].

Mal-NH-ethyl-SS-propionic acid, a cleavable linker employed for the synthesis of antibody-drug conjugates (ADCs)[1], plays a crucial role in the modulation of drug release from the conjugate.