Patent ID: 7378403

Claim:
A compound of the formula I: or a pharmaceutically acceptable salt thereof wherein X and Y are independently selected from the group consisting of O, CF 2 , CH 2 , and CHF; wherein A is P(O)OH; R 2 is selected from the group consisting of H, OH, C 1 -C 25 alkyloxy, C 6 -C 10 aryloxy, C 3 -C 8 cycloalkyloxy, C 3 -C 8 cycloalkyl C 1 C 6 alkoxy, C 2 -C 22 alkenyloxy, C 3 C 8 cycloalkenyloxy, C 7 -C 32 aralkyloxy, C 7 C 32 alkylaryloxy, C 9 -C 32 aralkenyloxy, and C 9 -C 32 alkenylaryloxy; R 3 -R 6 are independently selected from the group consisting of H and OH; and R 1 and R 7 are independently selected from the group consisting of C 1 C 25 alkyl, C 6 -C 10 aryl, C 3 -C 8 cycloalkyl, C 2 -C 22 alkenyl, C 3 -C 8 cycloalkenyl, C 7 -C 32 aralkyl, C 7 -C 32 alkylaryl, C 9 -C 32 aralkenyl, and C 9 -C 32 alkenylaryl; with the provisos that (i) when X is O, Y is O or CH 2 , and R 3 is H, at least one of R 2 and R 4 -R 6 is not OH; (ii) all of R 2 -R 6 are not simultaneously H; (iii) R 5 and R 4 are not simultaneously H; (iv) R 2 , R 3 , R 5 , and R 6 are not simultaneously OH or H and (v) when X and Y are O, R 1 is C 18 H 37 , and only one of R 2 and R 6 is OCH 3 , then R 3 and R 5 are not simultaneously OH.