Acid-PEG-t-butyl ester is a chemical compound that has gained significant attention in pharmaceutical research and development due to its unique properties and potential applications. As a derivative of polyethylene glycol (PEG), this compound is widely used as a drug delivery system due to its ability to enhance the solubility, stability, and bioavailability of various therapeutic agents. Acid-PEG-t-butyl ester is particularly useful in the formulation of poorly water-soluble drugs, as it can form stable, biocompatible micelles that encapsulate the drug molecules and facilitate their delivery to target tissues. You may need more other peg carboxylic acid.