CPC C07D 487/04 (2013.01) [A61P 29/00 (2018.01)] | 14 Claims |
1. A compound having the formula 4:
or a pharmaceutically acceptable salt, ester, stereoisomer, or solvate thereof, wherein:
R1 is selected from the group consisting of hydrogen, hydroxy, and benzyloxy;
R2 is selected from the group consisting of hydrogen, a C1-C6 straight or branched chain alkoxy, and benzyloxy;
R3 is selected from the group consisting of hydrogen and a C1-C6 straight or branched chain alkyl; and
R4 is selected from the group consisting of hydrogen and a C1-C6 straight or branched chain alkyl.
|