Patent ID: 7741521

Claim:
A compound having the formula (A): wherein each of R 1 and R 2 is independently selected from a group consisting of: Y is a moiety selected from a group consisting of: X is a moiety selected from a group consisting of: R 3 is at least one substitutent in ortho-, meta-, or para-position of the benzene ring, wherein “(R 3 ) 1-5 ” symbolizes that the number of R 3 substitutents is between 1 and 5, inclusively, wherein R 3 is selected from a group consisting of: n is an integer having the value between 1 and 5; and Ph in any of R 1 , R 2 , and R 3 is independently selected from an unsubstituted phenyl ring and a substituted phenyl ring having between one and five substitutents in ortho-, meta-, or para-position of the benzene ring, wherein the substitutents in the ring are selected from the group consisting of: or a pharmaceutically acceptable salt thereof.