{
    "Hex":["Man","Gal","Glc","Hex"],
    "HexNAc":["GalNAc","GlcNAc","ManNAc","HexNAc"],
    "dHex":["Fuc","dHex"],
    "Pent":["Xyl","Pent"],
    "HexA":["GlcA","GalA","IdoA","ManA","HexA"],
    "HexN":["GlcN","GalN","ManN","HexN"],
    "NeuAc":["NeuAc"],
    "NeuGc":["NeuGc"],
    "S":["S"],
    "P":["P"],
    "Xxx":["Xxx"]
}