Romidepsin Fmoc silyl Impurity

Chemical Name: (5R,8S,14S,Z)-(S,E)-1-oxo-1-(2-(trimethylsilyl) ethoxy)-7-(tritylthio)hept-4-en-3-yl 11-ethylidene-1-(9H-fluoren-9-yl)-5,14-diisopropyl-3,6,9,12-tetraoxo-8-((tritylthio) methyl)-2-oxa-4,7,10,13-tetraazapentadecan-15-oate