Patent ID: 7521478

Claim:
A compound of the general formula I, a pharmaceutically acceptable salt, or a stereoisomer thereof wherein each R is independently selected from the group consisting of H, SiR′ 3 , SOR′, SO 2 R′, C(═O)R′, C(═O)OR′, C(═O)NHR′, substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, aryl, heteroaryl or aralkyl; the group R′ is independently selected from substituted or unsubstituted alkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, aminoalkyl, aryl, aralkyl and heterocyclic groups; and the group R″ is selected from the group consisting of H, OH, OR′, OCOR′, SH, SR′, SOR′, SO 2 R′, NO 2 , NH 2 , NHR′, N(R′) 2 , NHCOR′, N(COR′) 2 , NHSO 2 R′, CN, halogen, C(═O)H, C(═O)R′, CO 2 H, CO 2 R′, CH 2 OR, substituted or unsubstituted alkyl, substituted or unsubstituted haloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkylidene, substituted or unsubstituted alkynyl, substituted, or unsubstituted aryl, substituted or unsubstituted aralkyl and substituted or unsubstituted heteroaromatic; with the proviso that the compound is not a compound of formula