[
  {
    "gtc_id":	"G51331BY",
    "iupac_condensed":	"Gal(b1-4)GlcNAc(?1-",
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	383.14
  },
  {
    "gtc_id":	"G31618LI",
    "iupac_condensed":	"Gal?3S(b1-",
    "motif":	null,
    "subsumption":	null,
    "mass":	null
  }
]