Azido-PEG3-CH2CO2Me is a functional group commonly used in pharmaceutical research and development. This group contains an azido (N3) functional group, which is a powerful tool for bioconjugation reactions, and a PEG (polyethylene glycol) linker, which imparts water solubility and biocompatibility to the molecule. The acetyl-protected carboxylic acid (CO2Me) is also present in the molecule, which provides another reactive site for conjugation reactions. Due to its unique properties, Azido-PEG3-CH2CO2Me has been extensively used in drug discovery and development, including protein labeling, targeted drug delivery, and surface modification of medical devices. The versatility of this functional group makes it a valuable tool for pharmaceutical research and development.