CPC C07D 277/34 (2013.01) [A61K 31/427 (2013.01)] | 17 Claims |
1. A compound having the formula I:
or a pharmaceutically acceptable salt, ester, stereoisomer, or solvate thereof, wherein:
R is selected from the group consisting of
methyl, ethyl, butyl, pentyl, and hexyl; and
each X is the same or different and is H or COOMe.
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