tert-Butyl ((2R,3S,4E,8Z)-1-((Bis(2-cyanoethoxy)phosphoryl)oxy)-3-((tert-butyldimethylsilyl)oxy)octadeca-4,8-dien-2-yl)carbamate is an intermediate in the synthesis of (4E, 8Z)-Sphingadienine-C18-1-phosphate (S680655), which is a sphingoid base of sea cucumber cerebroside that may have cytotoxicity activity against human colon cancer cells.