12,15,18,21-Tetraoxapentatriacontane,1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,27,27,28,28,29,29,30,30,31,31,32,32,33,33,34,34,35,35,35-octatriacontafluoro-
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