label: 2-[(2,2-difluoro-2-pyridinium-2-ylethyl)amino]-4-(2-{[(3-fluoro-4-methylpyridin-2-yl)methyl]amino}-2-oxoethyl)-5-methyl-3-oxo-3,4-dihydropyrazin-1-ium
label_lc: 2-[(2,2-difluoro-2-pyridinium-2-ylethyl)amino]-4-(2-{[(3-fluoro-4-methylpyridin-2-yl)methyl]amino}-2-oxoethyl)-5-methyl-3-oxo-3,4-dihydropyrazin-1-ium