Showing structure for n-({7-[(1-acetylaziridin-2-yl)(hydroxy)methyl]-9-(1,3-dioxobutan-2-ylidene)-3-hydroxy-2-methyl-4,11-dioxo-1,5,8-trioxa-10-azaspiro[5.5]undecan-2-yl}methyl)-3-methoxy-5-methylnaphthalene-1-carboximidic acid