1 GSL (2s,3r)-3-hydroxy-2-(tetradecanoylamino)octadecyl alpha-D-galactopyranosiduronic acid 1.000 2 EIS N-{(2s,3r,4e)-3-hydroxy-1-[(3-O-sulfo-beta-D-galactopyranosyl)oxy]octadec-4-en-2-yl}dodecanamide 0.830 3 A1CDL N-{(2s,3r,4e)-1-[(4-O-beta-D-galactopyranosyl-beta-D-glucopyranosyl)oxy]-3-hydroxyoctadec-4-en-2-yl}octadecanamide 0.719