Patent ID: 8268883

Claim:
A compound of general formula (I): wherein the As(OH) 2 group is para- to the N-atom on the phenyl ring; R 1 is selected from hydrogen and C 1-3 alkyl; R 2 and R 3 may be the same or different and are independently selected from hydrogen and optionally substituted C 1-3 alkyl; R 4 and R 5 may be the same or different and are independently selected from hydrogen and optionally substituted C 1-3 alkyl; m is 1; n is 1; * indicates a chiral carbon atom; and wherein each optional substituent is independently C 1-3 alkyl, C 1-3 alkoxy, halo, hydroxyl, or hydroxy(C 1-3 )alkyl; or a salt thereof, or an enantiomer or racemate thereof.