Temozolomide compounds, polymers prepared therefrom, and method of treating a disease

A polymer comprising repeating units comprising temozolomide derived from a temozolomide compound, wherein the repeating units comprising temozolomide are of formula (IV):

• wherein
• R4 is independently at each occurrence a hydrogen or a C1-6 alkyl group;
• Y is independently at each occurrence —O— or —NH—;
• L3 is independently at each occurrence a divalent C1-12 alkylene group, di(C1-12) alkylene disulfide group, C1-12alkylene ester group, C6-20arylene group, or C1-20 alkylene oxide group;
• Z is independently at each occurrence a disulfide group or an amide group;
• L1 is independently at each occurrence a divalent C1-12 alkylene group, di(C1-12 alkylene) disulfide group, C1-12 alkylene ester group, C6-20 arylene group, C1-20 alkylene oxide group, or C1-12 alkylene sulfide group;
• X is independently at each occurrence —O— or —NH—;
• and
• p is independently at each occurrence 0 or 1.