2-Deoxy-2-fluoro-L-fucose

2-Deoxy-2-fluoro-L-fucose (2FF) is a fluorinated analogue of fucose that can be converted to GDP (Guanosine Diphosphate)-2FF in vitro, a competitive inhibitor of alpha-1,3-fucosyltransferase V. It can also be metabolised inside the cell to a substrate-based inhibitor of fucosyltransferases. 2FF reduces fucosylation of IgG in antibodies, which increases therapeutic efficacies of antibodies that cause antibody-dependent cellular cytotoxicity.