The invention relates to compounds that include biologically active agents (e.g., compounds according to any of formulas (I) and (I-A) that can be used for effective drug release, e.g., as coatings for medical devices. Use of these compounds in the coating of surfaces can allow for long-term drug release as well as imparting uniform coatings with little phase separation compared to, e.g., the parent biologically active agent.
