Amino-PEG-CH2CO2-t-butyl ester is a compound that belongs to the class of polyethylene glycol (PEG) derivatives. The molecule consists of three main functional groups, including an amino group, a carboxylic acid group, and a t-butyl ester group. These functional groups play a critical role in the compound’s ability to conjugate with other molecules and be used in various applications, including drug delivery and pharmaceutical research and development. Specifically, the amino group allows for the attachment of the compound to biomolecules, while the carboxylic acid group can be used for drug conjugation. The t-butyl ester group provides stability and protection to the compound during storage and transportation.