[
  {
    "gtc_id":	"G80479JF",
    "iupac_condensed":	null,
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	null
  },
  {
    "gtc_id":	"G31600MW",
    "iupac_condensed":	"GlcA(b1-2)Man(a1-3)Man(a1-3)Man",
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	680.2
  },
  {
    "gtc_id":	"G49989HD",
    "iupac_condensed":	"GlcA(b1-2)Man(a1-3)Man",
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	518.15
  }
]