Patent ID: 7361760

Claim:
A compound having a structure: or a stereoisomer or a pharmaceutically acceptable salt thereof, wherein: R is selected from the group consisting of C 6 -C 12 aryl, C 7 -C 12 arylalkyl, C 2 -C 12 acylalkyl, —(CH 2 ) m C(═O)Ar, and —(CH 2 ) m NR 4 R 5 , wherein R is unsubstituted or substituted with at least one substituent selected from the group consisting of —F, —Cl, and —CN; R 1 is selected from the group consisting of —CN, —C(═O)OR 3 , and —NHC(═O)R 3 ; R 3 is C 1 -C 12 alkyl; R 4 and R 5 are independently selected from the group consisting of hydrogen and C 1 -C 12 alkyl; X is selected from the group consisting of hydrogen, halogen, —F, —Cl, —CN, and C 1 -C 12 alkyl; Y is selected from the group consisting of hydrogen, halogen, —F, —Cl, —CN, and C 1 -C 12 alkyl; Z is selected from the group consisting of hydrogen, halogen, —F, —Cl, —CN, and C 1 -C 12 alkyl; Ar is phenyl; and m is independently 0, 1, 2, 3, or 4.