Showing structure for 10-[8-(4-carboxy-3-methylbuta-1,3-dien-1-yl)-9-[(3-carboxyprop-2-enoyl)oxy]-9-hexyl-3-methyl-1,7-dioxaspiro[5.5]undecan-2-yl]-5-hydroxy-4,8-dimethyldeca-2,6,8-trienoic acid