Patent ID: 7186744

Claim:
A compound of the formula or a salt or ester thereof, wherein said compound is not naturally occurring; the hatched wedge indicates an α configuration and the solid wedge indicates a β configuration; the dashed line indicates the presence or absence of a double bond; A and B are both CHOH, or A is CHOH and B is C═O, or B is CHOH and A is C═O; R 1 is indolyl, or monohydroxy or dihydroxy indolyl; R 2 is OH or H; R 3 is n-butyl, n-pentyl, or n-hexyl; cyclohexyl, Ar, or W—Ar; wherein Ar is phenyl, naphthyl optionally substituted with 1 to 3 substituents selectd from the group consisting of halogen, methyl, or trifluoromethyl; and W is CH 2 ; and R 4 is hydrogen, methyl, ethyl, iso-propyl, or n-propyl.