Showing structure for n-(3-{5,17-dihydroxy-2-oxo-3,7-dioxatricyclo[11.4.0.0⁶,⁸]heptadeca-1(17),9,11,13,15-pentaen-4-yl}prop-1-en-1-yl)-4-(methoxyimino)but-2-enimidic acid