[
  {
    "gtc_id":	"G57321FI",
    "iupac_condensed":	"GalNAc(a1-",
    "motif":	"[{\"label\":\"Tn antigen\",\"id\":\"G57321FI\"}]",
    "subsumption":	null,
    "mass":	null
  },
  {
    "gtc_id":	"G36123IU",
    "iupac_condensed":	"Neu5Ac(a2-6)GalNAc(a1-",
    "motif":	"[{\"label\":\"Sialyl Tn antigen\",\"id\":\"G36123IU\"}]",
    "subsumption":	"Fully-defined saccharide",
    "mass":	512.19
  }
]