630389-81-0 1,15,18-Trioxa-4,6,10,12-tetraazacycloeicosane-5,11-dithione,8,8'-[[5-(1,1-dimethylethyl)-1,3-phenylene]bis(methylene)]bis- 121368-60-3 Ethyl perfluoro-2,5,8,11,14,17-hexamethyl-3,6,9,12,15,18-hexaoxaeicosanoate 140369-31-9 6,9-Dioxa-12-thia-2-silaeicosane,2-chloro-15,15,16,16,17,17,18,18,19,19,20,20,20-tridecafluoro-2-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-