Patent ID: 8367625

Claim:
A compound having the following structure (I): or a stereoisomer or pharmaceutically acceptable salt thereof, wherein: Q 1 is —NR 1 R 11 or —NR 11 R 12 ; Q 2 is optionally substituted alkyl, each R 1 and R 2 is, independently, hydrogen or an amino protecting group; each R 3 is, independently, hydrogen or a hydroxyl protecting group; each R 4 , R 5 , R 7 and R 8 is, independently, hydrogen or C 1 -C 6 alkyl optionally substituted with one or more halogen, hydroxyl or amino; each R 6 is, independently, hydrogen, halogen, hydroxyl, amino or C 1 -C 6 alkyl; or R 4 and R 5 together with the atoms to which they are attached can form a heterocyclic ring having from 4 to 6 ring atoms, or R 5 and one R 6 together with the atoms to which they are attached can form a heterocyclic ring having from 3 to 6 ring atoms, or R 4 and one R 6 together with the atoms to which they are attached can form a carbocyclic ring having from 3 to 6 ring atoms, or R 7 and R 8 together with the atom to which they are attached can form a heterocyclic ring having from 3 to 6 ring atoms; each R 9 is, independently, hydrogen, hydroxyl, amino or C 1 -C 6 alkyl optionally substituted with one or more halogen, hydroxyl or amino; each R 10 is, independently, hydrogen, halogen, hydroxyl, amino or C 1 -C 6 alkyl; or R 9 and one R 10 together with the atoms to which they are attached can form a heterocyclic ring having from 3 to 6 ring atoms; each R 11 and R 12 is, independently, C 1 -C 6 alkyl or substituted C 1 -C 6 alkyl; and n is an integer from 0 to 4.