Negative charge parents crocking characteristic block copolymer and particular copolymer and the block copolymer which possesses the mixture null below-mentioned system of the positive charge

摘要

The present invention provides an anionic group-containing amphiphilic block copolymer that is biocompatible and biodegradable and, when used as a drug carrier for a cationic drug, provides several advantages such as increased blood concentration and improved stability of the drug.