Patent ID: 8703804

Claim:
A compound of formula (I): wherein: R 1 is selected from the group consisting of H, lower alkyl, upper alkyl, lower alkylsulfonate, upper alkylsulfonate, —C(O)-lower alkyl, —C(O)-upper alkyl and acyl; R 2 is selected from the group consisting of cycloalkyl, —OSO 3 − , a sugar, and phenyl optionally mono-, di- or tri-substituted with a group selected from halogen, lower alkyl and lower alkoxy; R 3 is —CH—; R 4 is —CH 2 —; R 3 and R 4 are joined by a single or double bond; R 5 and R 6 are each independently selected from the group consisting of H, lower alkyl and acyl, or R 5 and R 6 together form —C(O)—, —(CH 2 ) p —, —(CH 2 ) q C(O)— or —C(O)(CH 2 ) r —, wherein p=1-7 and q and r are independently 1-6; and n and o are each independently 1-5; m is 2, 3, 4 or 5; provided that when R 1 is H and R 3 and R 4 are single bonded, the following provisos apply: when R 5 and R 6 are each —C(O)CH 3 , then R 2 is not 2-methoxyphenyl; when R 5 is —C(O)-t-butyl and R 6 is H, then R 2 is not 2-methoxyphenyl; when R 5 and R 6 together form —C(O)—, then R 2 is not 2-methoxyphenyl; and when R 5 is H or C 1 -C 6 acyl, R 6 is H or C 1 -C 6 alkyl, then R 2 is not phenyl that is mono- or di-substituted with any combination of halogen, C 1 -C 6 alkyl, or C 1 -C 6 alkoxy; and provided that when R 1 is H, R 3 and R 4 are single bonded, and R 5 is H, the following provisos apply: when R 6 is —C(O)CH 3 , then R 2 is not 2-methoxyphenyl; when R 6 is methyl or n-butyl, then R 2 is not 2-methoxyphenyl; and when R 6 is H, then R 2 is not phenyl, 2-methylphenyl, 3-methylphenyl, 2,3-dimethylphenyl, 4-t-butylphenyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, 2-ethoxyphenyl, 2-chlorophenyl, 4-fluorophenyl, 5-fluoro-2-methoxyphenyl, or 2,6-dimethoxyphenyl.