Benzo[1'',2'':3,4;4'',5'':3',4']dicyclobuta[1,2-c:1',2'-c']difuran-1,3,5,7-tetrone,decahydro- (9CI); Tricyclo[6.2.0.03,6]decane-4,5,9,10-tetracarboxylic4,5:9,10-dianhydride (8CI)
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