主权项 |
1. A compound of the formula below: wherein
R1 is selected from: —CH3 and —CF3;R2 is selected from: H and —CH3;R3 is selected from: H and —CH3;R4 is selected from: H, —OC1-3alkyl, and halogen;R5 is selected from: H, —CF3, —OCH3, and halogen;R6 is selected from: H and halogen;provided that at least one of R4, R5, and R6 is H; or a pharmaceutically acceptable salt thereof. |