Patent ID: 7294738

Claim:
A compound of Formula 9, wherein P is —P— or —P═O; X is —O— or —NR 4 ; R 1 to R 3 are independently selected from the group consisting of hydrogen; C 1 –C 10 alkyl; carboxyl; C 1 –C 10 hydroxyalkyl; C 1 –C 10 alkoxycarbonyl; C 5 –C 10 aryl unsubstituted or substituted with C 1 –C 10 alkyl, hydroxyl, C 1 –C 10 alkoxyl, trihaloalkyl, carboxyl, C 1 –C 10 acyl, C 1 –C 10 hydroxyalkyl, amino, C 1 –C 10 alkylamino, C 1 –C 10 dialkylamino, and C 1 –C 10 alkoxycarbonyl; and C 5 –C 10 arylalkyl unsubstituted or substituted with C 1 –C 10 alkyl, hydroxyl, C 1 –C 10 alkoxyl, cyano, halo, trihaloalkyl, carboxyl, C 1 –C 10 acyl, C 1 –C 10 hydroxyalkyl, amino, C 1 –C 10 alkylamino, C 1 –C 10 dialkylamino, and C 1 –C 10 alkoxycarbonyl; and R 4 is selected from the group consisting of hydrogen; C 1 –C 10 alkyl; C 1 –C 10 acyl; C 1 –C 10 hydroxyalkyl; C 5 –C 10 aryl unsubstituted or substituted with C 1 –C 10 alkyl, hydroxyl, C 1 –C 10 alkoxyl, cyano, halo, trihaloalkyl, carboxyl, C 1 –C 10 acyl, C 1 –C 10 hydroxyalkyl, amino, C 1 –C 10 alkylamino, C 1 –C 10 dialkylamino, and C 1 –C 10 alkoxycarbonyl; and C 5 –C 10 arylalkyl unsubstituted or substituted with C 1 –C 10 alkyl, hydroxyl, C 1 –C 10 alkoxyl, cyano, halo, trihaloalkyl, carboxyl, C 1 –C 10 acyl, C 1 –C 10 hydroxyalkyl, amino, C 1 –C 10 alkylamino, C 1 –C 10 dialkylamino, and C 1 –C 10 alkoxycarbonyl.