Patent ID: 7776814

Claim:
A compound in the general formula U—V—W, wherein U refers to the Formula (I), wherein A has the following structure X is CH 2 ; Y is an oxygen atom; R 1 and R 3 together are of the formula —(CH 2 ) 4 —; R 2 is a C 1 -C 4 alkyl group; R 4 , R 5 , R 6 , and R 19 are hydrogen atoms; R 7 is an alkyl group; R 8 is a hydrogen atom, an alkyl, alkenyl, or a heteroalkyl group R 9 is an alkyl group; R 11 is an acetyl group; R 12 is a group of formula NHR 18 ; R 18 has the following structures: wherein R 19 is H or OH and R 20 is —V—W or wherein R 19 is —V—W and R 20 is OH, NH 2 , or a heteroalkyl group; V is an oxygen atom, a NH group, or a heteroalkylene group wherein the heteroatoms are selected from O, S, and N; and W is polyethylene glycol (PEG) or a cyclodextrin comprising polyethylene glycol (PEG).