1 4HQ (4-amino-1,2,5-oxadiazol-3-yl)(4-methylpiperazin-1-yl)methanone 1.000 2 4GX (4-amino-1,2,5-oxadiazol-3-yl)[4-(pyridin-2-ylmethyl)piperazin-1-yl]methanone 0.714