The invention relates generally to a compound of Formula (I), wherein R1is a bicyclic fused heterocyclic moiety and R2is H or F. The compound of Formula (I) or a pharmaceutically acceptable salt thereof has potential medical use in the treatment or prevention of conditions such as stroke; amyotrophic lateral sclerosis; multiple sclerosis; Alzheimer s disease; Huntington s disease, atherosclerosis, diabetic retinopathy; dilated cardiomyopathy; ischemic injury and left ventricular hypertrophy post myocardial infarction.