In the ChemMLM subunit, for the ChemBalancer-determined LHS insufficient reactions, the trained ChemMLM proposes multiple solutions for an extra reactant "P". ChemBalancer then detects which proposed reaction "A+B+C+P → D+E" is balanced, or could be balanced by All complete reactions are shown inside the red dashed boxes in Figure . These reactions could potentially be used to train another round of the ChemMLM model for further broadening the complete reaction space. However, this was not conducted, since the workflow carries erroneous assumptions. These errors would be propagated into another round of training if these data were used to retrain the ChemMLM model, and further reduce the predictability.