Tos-PEG3-t-butyl ester is a PEG analogue containing a t-butyl ester and a tosyl group.

Azido-PEG4-alcohol is a PEG analogue containing an azide group and a terminal hydroxyl group.

N-Boc-PEG3-alcohol is a PEG analogue containing a hydroxyl group and Boc-protected amino group.

Azido-PEG3-amine is a PEG analogue containing an amino group with an azide group.

Amino-PEG3-acid is a PEG analogue containing an amino group with a terminal carboxylic acid.

5-Ethynyl-2′-deoxyuridine (EdU), a nucleoside analog, is an alkyl chain-based PROTAC linker that can be used in the synthesis of PROTACs.

N-Boc-PEG4-alcohol is a PEG analogue containing a hydroxyl group and Boc-protected amino group.

Amino-PEG6-alcohol is a PEG analogue containing an amino group with a hydroxyl group.

Azido-PEG2-alcohol is a PEG analogue containing an azide group and a terminal hydroxyl group.

Amino-PEG5-alcohol is a PEG analogue containing an amino group with a hydroxyl group.