Patent ID: 8658600

Claim:
A compound represented by formula I: wherein, independently for each occurrence, R 1 is R is —H, —OH or —OPO 3 H 2 ; p is 0, 1, 2, 3, or 4; R 2 is q is 0, 1, 2, 3, or 4; R 3 is aryl or aralkyl; W is —CH 2 —, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 — or —CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 —; X is —O—, —N(H)—, or —S—; m is 0 or 1; Y is —CH 2 —, —CH 2 CH 2 —, —CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 —, —CH 2 CH 2 CH 2 CH 2 CH 2 — or —CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 —; and Z is an antineoplastic agent; provided that the sum of p and q is 2, 3, 4, 5, 6, 7 or 8; and at least one instance of R is —OH or —OPO 3 H 2 .