Patent ID: 7268245

Claim:
A compound having the structure wherein, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are independently selected from hydrogen, substituted and unsubstituted aryl, substituted and unsubstituted alkyl, and substituted and unsubstituted cycloalkyl, or R 1 , R 2 , R 3 , and R 4 together with the carbons atoms to which they are attached form a substituted and unsubstituted benzene ring, or R 5 , R 6 , R 7 , and R 8 together with the carbons atoms to which they are attached form a substituted and unsubstituted benzene ring; Y at each occurrence is independently selected from O and NR 9 , wherein R 9 is selected from hydrogen, substituted and unsubstituted alkyl, and substituted and unsubstituted acyl; n is 0, 1, 2, 3, 4, or 5; and X 1 and X 2 are independently selected from ammonia, amino, nitro, C1-C6 alkoxy, hydroxy, chloride, bromide, and iodide.