[
  {
    "gtc_id":	"G15591RG",
    "iupac_condensed":	"Araf(a1-3)[Xyl(b1-4)]Xyl(b1-4)Xyl",
    "motif":	null,
    "subsumption":	"Linkage-defined saccharide",
    "mass":	546.18
  }
]