Using ligands L19-L36, we evaluated the remaining 16 products defined in the training set. These ligands encompass three classes of ligands commonly utilized in Ullmann couplings: diketone , oxalamide , and anilino(oxo)acetic acid ligands . Ultimately, our comprehensive training set encompassed a total of 720 reactions (excluding controls), achieving a satisfactory ratio of 3.5:1 between off and on reactivity (see all yields and dataset distribution in the SI).