preferred_name: a ganglioside Ac-O-8-GD2 <=> a ganglioside Ac-O-9-GD2
preferred_name_lc: a ganglioside ac-o-8-gd2 <=> a ganglioside ac-o-9-gd2
label: a ganglioside Ac-O-8-GD2 <=> a ganglioside Ac-O-9-GD2
label_lc: a ganglioside ac-o-8-gd2 <=> a ganglioside ac-o-9-gd2