given the sufficient model accuracy and reasonable number of features for our dataset size. These 16 features are referred to in this work as "Mordred" features, though these only include a subset of the entire set of features from the Mordred calculator. Distributions of E min values for reported molecules (n=30,000) and unreported molecules (n=96,000) in QM9. E min values for reported molecules are generally lower than those for unreported molecules. When E min > 26 kcal/mol, the probability of a molecule being unreported exceeds that of a molecule being reported. There are almost no reported molecules with E min above 100 kcal/mol, suggesting low E min is necessary for synthesizability. But, because there are unreported molecules with E min as low as 0, low E min is a necessary, but not sufficient condition for synthesizability.