Eicosane
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1,6,11,16-Tetraazacycloeicosane-2,5,12,15-tetrone,1,8,11,18-tetrahydroxy-, [8S-(8R*,18R*)]-CAS 117959-43-0 Cat. 622009 -
1,8-Diazacycloeicosane-2,9-dioneCAS 84756-43-4 Cat. 687244