The name/synonym for ligand BCT (curated from ChEBI, PubChem, and PDB databases):

1HYDROGENCARBONATE
2HYDROGENTRIOXOCARBONATE(1-)
3HYDROGEN(TRIOXIDOCARBONATE)(1-)
4BICARBONATE
5HCO3(-)
6HYDROGENTRIOXOCARBONATE(IV)
7[CO2(OH)](-)
8HYDROXIDODIOXIDOCARBONATE(1-)
9HYDROGENCARBONATE(1-)
10BICARBONATE ION
11HCO3-
12ACID CARBONATE