| abstract |
A compound of Formula ** Formula ** in which R1 is selected from the group consisting of H and CH3; R2 is selected from the group consisting of H and CH3; R3 is selected from the group consisting of H, C1-C3 alkyl, O (CH2) 3SO2CH3, O (CH2) 2OCH3, O (CH2) 2C (CH3) 2OH, CN and OCF2; or a pharmaceutically acceptable salt thereof. |