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7-(2-Carboxybut-1-enyl)-5-[3-carboxy-2-(2-oxo-1,3-dioxolan-4-yl)but-3-en-2-yl]-12-hydroxy-2,2-dimethyl-7-propyldodeca-3,5,8-triene-2,5,8-tricarboxylic acid


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