| abstract |
Compounds of Formula I are described: preferably subject to the proviso that either (a) R 2 and R 3 together form —O—CH(R 10 )—O—, or (b) R 5 and R 6 together form —O—CH(R 10 )—O—, wherein R 10 is H, halo, or loweralkyl. Pharmaceutical salts, formulations, and methods of using the same in the treatment of cancer are also described. |