[
  {
    "gtc_id":	"G56299XO",
    "iupac_condensed":	"Neu5Ac(a2-3)Gal(b1-3)GalNAc(?1-",
    "motif":	"[{\"label\":\"GM4\",\"id\":\"G30207PZ\"},{\"label\":\"O-Glycan core 1 fuzzy\",\"id\":\"G00032MO\"}]",
    "subsumption":	"Linkage-defined saccharide",
    "mass":	674.24
  }
]