Patent ID: 8063083

Claim:
A method of treating a B-cell non-Hodgkin's lymphoma in a subject, comprising administering to the subject an effective amount of a compound represented by the following formula: or a tautomer or a pharmaceutically acceptable salt thereof, wherein: X 45 is CR 54 ; Z 1 is —OH or —SH; R 52 is selected from the group consisting of —H, methyl, ethyl, n-propyl, isopropyl, n-butyl, n-pentyl, n-hexyl, —(CH 2 ) 2 OCH 3 , —CH 2 C(O)OH, and —C(O)N(CH 3 ) 2 ; R 53 and R 54 are each, independently, —H, methyl, ethyl, or isopropyl; R 55 is selected from the group consisting of —H, —OH, —OCH 3 , and —OCH 2 CH 3 ; and R 56 is selected from the group consisting of —H, methyl, ethyl, isopropyl, and cyclopropyl.