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5,6-[(2,8,12,18-Tetrabutyl-3,7,13,17-tetramethyl-21H,23H-porphyrin-5,15-diyl)bis[(biphenyl-3,3'-diyl)(2,8,12,18-tetrabutyl-3,7,13,17-tetramethyl-21H,23H-porphyrin-5,15-diyl)(p-phenylene)ethynylene]]isoindoline-1,3-dione


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