109635-68-9 1,4,7,10,13,16,19,22,25,28,31,34,37,40,43,46,49-heptadecaoxacyclohenpentacontane 138379-38-1 1,4,7,10,13,16-Hexaazacyclooctadecane-1,4,7,10,13,16-hexaaceticacid, 2-[[4-[(bromoacetyl)amino]phenyl]methyl]- 104568-25-4 3,6,9-Trioxa-12-thiaeicosan-1-ol,15,15,16,16,17,17,18,18,19,19,20,20,20-tridecafluoro-