GalNAc(beta1-4)Glc1-ceramide; GlcNAc(beta1-3)Gal-NAc(beta1-4)Glc1-ceramide; Gal(beta1-4)GlcNAc(beta1-3)Gal-NAc(beta1-4)Glc1-ceramide; Gal(beta1-4)[Fuc(alpha1-3)]Glc-NAc(beta1-3)Gal-NAc(beta1-4)Glc1-++ +ceram ide (Lewis X pentasaccharide structure); Gal(beta1-4)[Fuc(alpha1-3)]GlcNAc(beta1-3)Glc-NAc(beta1-3)GalNAc(beta 1-4)Glc1-ceramide (Lewis X hexa-saccharide structure); and, Fuc(alpha1-3)Gal(beta1-4)[Fuc(alpha1-3)]GlcNAc(beta1-3)GalNAc(beta1-4 )Glc1-ceramide (pseudo-Lewis Y hexasaccharide structure).