Patent ID: 7820827

Claim:
A compound of formula I: wherein: R 1 is H or C 1 -C 6 alkyl; R 2a is C 1 -C 6 alkyl or C 2 -C 6 alkenyl; R 2b is H, C 1 -C 6 alkyl, or C 2 -C 6 alkenyl; R 3 is H, unsubstituted C 1 -C 6 alkyl, or unsubstituted benzyl; R 5 is —(CHR 8 )—W; R 4 and R 8 when taken together with the atoms through which they are connected, form a pyrrolidine or tetrahydroisoquinoline ring, wherein said pyrrolidine or tetrahydroisoquinoline ring is optionally substituted by one or more substituents selected from —OH, unsubstituted C 1 -C 6 alkyl, or unsubstituted C 1 -C 6 alkoxy; W is —C(═O)OR 9 ; R 9 is H, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, phenyl, C 3 -C 8 cycloalkyl, C 5 -C 8 cycloalkenyl, C 3 -C 8 cycloalkylC 1 -C 3 alkyl, C 5 -C 8 cycloalkenylC 1 -C 3 alkyl, or C 6 -C 10 arylC 1 -C 4 alkyl; m is the integer 0, 1, 2, 3, or 4; and q is the integer 0, 1, or 2; or a stereoisomer, pharmaceutically acceptable salt, or N-oxide thereof.