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2 > 20,30-Metheno-22,28,21,29-[1]propene[1,2]diyl[3]ylidynebenzo[6,7]tribenzo[4',5':8',9':10',11']chryseno[2',1',12':9,10,11]perylo[2,3,4-c1d1a]heptapheno[2,1,18,17,16,15,14,13-defghijklmnop]heptaphene
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