Use of the particular derivative to the pH responsiveness biodegradation characteristic poly- lactic acid derivative and the slightly soluble medicine transmission body which form high-molecular micelle

摘要

It regards the poly- lactic acid derivative where this invention can form micelle with the aqueous solution above pH4, the terminal carboxyl group 1 possesses. Because the slightly soluble medicine can be contained inside the above-mentioned micelle, application as a drug delivery system of various forms is possible.