[
  {
    "gtc_id":	"G33059TI",
    "iupac_condensed":	"GlcA(?1-",
    "motif":	null,
    "subsumption":	null,
    "mass":	null
  },
  {
    "gtc_id":	"G76120MB",
    "iupac_condensed":	"GlcA(?1-?)GlcA(?1-",
    "motif":	null,
    "subsumption":	"Topology",
    "mass":	370.07
  },
  {
    "gtc_id":	"G91388UH",
    "iupac_condensed":	"GalA(b1-",
    "motif":	null,
    "subsumption":	null,
    "mass":	null
  }
]