[
  {
    "gtc_id":	"G10683BS",
    "iupac_condensed":	"ManA2NAc(?1-4)ManA2NAc(?1-3)GlcNAc(a1-",
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	655.21
  },
  {
    "gtc_id":	"G35931GA",
    "iupac_condensed":	null,
    "motif":	"[{\"label\":\"Tn antigen\",\"id\":\"G57321FI\"}]",
    "subsumption":	null,
    "mass":	null
  },
  {
    "gtc_id":	"G65288VY",
    "iupac_condensed":	null,
    "motif":	"[{\"label\":\"Tn antigen\",\"id\":\"G57321FI\"}]",
    "subsumption":	"Fully-defined saccharide",
    "mass":	null
  }
]