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(5Z)-5-[[5-[5-[5-[5-[(Z)-(2,5-Dioxo-1,3-dioxolan-4-ylidene)methyl]-1-methylpyrrol-2-yl]thiophen-2-yl]thiophen-2-yl]-1-methylpyrrol-2-yl]methylidene]-1,3-dioxolane-2,4-dione


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