Showing structure for (2e,6e,8e)-10-{8-[(1e,3e)-4-carboxy-3-methylbuta-1,3-dien-1-yl]-3,9-dimethyl-1,7-dioxaspiro[5.5]undecan-2-yl}-5-hydroxy-4,8-dimethyldeca-2,6,8-trienoic acid