| abstract |
A compound of formula I: ** Formula ** or a pharmaceutically acceptable salt thereof, wherein R is a substituted phenyl, a substituted biphenyl, substituted or unsubstituted pyrid-4-yl, or substituted or unsubstituted furan-3-yl replaced; wherein, when R is a substituted biphenyl, a substituted pyrid-4-yl or a substituted furan-3-yl, R is substituted with 1 to 3 residues (R ', R ", R'") independently selected from a group C1-C10 alkyl or a hydroxyl group, and wherein when R is a substituted phenyl, R is substituted with 1 to 3 moieties (R ', R ", R'") independently selected from a C1-C10 alkoxy group. |