Thioctic-(8-biotinoylamido-3,6-dioxaoctyl)amide were synthesized by thioctic acid,diamine with ether linkage and biotin.The molecular structures of the intermediates and the target compounds were confirmed by 1 H NMR,GC-MS and FT-IR.All kinds of biotinylated molecules can be synthesized by change the side of biotin.Thus applications and kinds of the material of biotin-avidin/streptav...