Patent ID: 8410083

Claim:
A compound according to formula A: or a pharmaceutically acceptable salt thereof, wherein: R 1 is hydroxy, substituted or unsubstituted alkyl, or halogen; R 2 is α-hydroxy; R 3 is hydrogen, hydroxy, NH(CH 2 ) m SO 3 H, or NH(CH 2 ) n CO 2 H; R 4 is substituted or unsubstituted alkyl, or halogen; R 5 is unsubstituted or substituted alkyl, or aryl; R 6 is hydrogen, unsubstituted or substituted alkyl, or R 5 and R 6 taken together with the carbons to which they are attached form a ring of size 4, 5, or 6 atoms; R 7 is hydrogen, substituted or unsubstituted alkyl, or hydroxy; R 8 is hydrogen or substituted or unsubstituted alkyl; R 9 is hydrogen, substituted or unsubstituted alkyl or taken together R 8 and R 9 form a carbonyl; R 10 is R 3 or SO 3 H; m is an integer 0, 1, 2, 3, 4, or 5; and n is an integer 0, 1, 2, 3, 4, or 5.