1 HA3 N-hydroxy-5-[(3-phenyl-5,6-dihydroimidazo[1,2-a]pyrazin-7(8h)-yl)carbonyl]thiophene-2-carboxamide 1.000 2 TFG 2,2,2-trifluoro-1-{5-[(3-phenyl-5,6-dihydroimidazo[1,2-a]pyrazin-7(8h)-yl)carbonyl]thiophen-2-yl}ethane-1,1-diol 0.774