threo-1,3-Dihydroxy-2-aminooctadecaneL-threo-DihydrosphingosineSafingolDL-threo-DihydrosphingosineL-threo-DihydrosphingosineL-(-)-threo-SphinganineSafingol(-)-threo-DihydrosphingosineL-threo-2-Amino-1,3-octadecanediolDL-threo-1,3-Dihydroxy-2-aminooctadecane(2S,3S)-2-Amino-1,3-octadecanediol