threo-1,3-Dihydroxy-2-aminooctadecaneSafingolL-threo-DihydrosphingosineDL-threo-DihydrosphingosineL-(-)-threo-SphinganineL-threo-DihydrosphingosineSafingolL-threo-2-Amino-1,3-octadecanediol(-)-threo-DihydrosphingosineDL-threo-1,3-Dihydroxy-2-aminooctadecane(2S,3S)-2-Amino-1,3-octadecanediol