15,18,21-Trioxa-11,25-dithiapentatriacontane-13,23-diol,1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,28,28,29,29,30,30,31,31,32,32,33,33,34,34,35,35,35-tetratriacontafluoro-