Patent ID: 8481501

Claim:
A compound having the formula: or a pharmaceutically acceptable salt thereof and all stereochemical arrangements of substituents, including racemic or stereochemically pure compounds, wherein: R 1 is selected from the group consisting of H, (C 1 -C 5 )alkylC(O)—, (C 7 -C 10 )aralyl, and (C 1 -C 5 )alkyl; R 2 is selected from the group consisting of (C 1 -C 5 )alkyl, C 3 -C 6 (cycloalkyl)alkyl, C 5 -C 7 (cycloalkenyl)alkyl, (C 6 -C 12 )aryl(C 7 -C 12 )aralkyl, trans(C 4 -C 5 )alkenyl, allyl, and furan-2-ylalkyl; each R 8 is independently selected from the group consisting of H, (C 1 -C 5 )alkylC(O), (C 7 - 10 )aralylC(O), (C 7 -C 10 )aralyl, and (C 1 -C 5 )alkyl; and R 9 is selected from the group consisting of CH 2 OH, CH 2 O 2 C(C 1 -C 5 )alkyl, CH 2 O(C 7 -C 10 )aralyl, CO 2 H, CO 2 (C 1 -C 5 )alkyl, and CO 2 (C 7 -C 10 )aralkyl.