2-Deoxy-2,2-difluoro -L-threo-pentonic acid γ-lactone

L-erythro-Pentonic acid, 2-deoxy-2,2-difluoro-,γ-lactone

(4S,5S)-3,3-Difluoro-4-hydroxy-5-(hydroxyMethyl)dihydrofuran-2(3H)-one