| abstract |
Compounds useful as biologically active compounds are disclosed. The compounds have the following structure (I): or a stereoisomer, tautomer or salt thereof, wherein R 1 , R 2 , R 3 , R 4 , R 5 , L, L 1 , L 2 , L 3 , L 4 , M, q, w and n are as defined herein. Methods associated with preparation and use of such compounds is also provided. |