Showing structure for 3-{1-[({2-[2-butyl-3-(oxido-c-hydroxycarbonimidoyl)propanoyl]-1,2-diazinan-3-yl}(hydroxy)methylidene)amino]-2-methylbutyl}-5-carboxy-5h,6h,7h,8h-4λ⁵-pyrazolo[1,2-a]pyridazin-4-ylium