Gangliosides consists of
Ganglioside = ceramide + oligosaccharide chain (e.g. glucose + galactose) + sialic acid (N-acetylneuramic acid).

or

Ganglioside = sphingosine + long chain fatty acid + oligosaccharide chain + sialic acid (NANA).
Long chain fatty acid (LCFA)
Alcohol-sphingosine
Sailic acid
All of these