The ethyl-2-yl formate radical, ĊH 2 CH 2 OCHO, was chosen as the model system for reaction exploration due to its role in the combustion mechanism of 1,3-dioxolane, a biofuel. For barrier calculations, the lowest energy ĖF conformer was used as a reference. After exploration, a manual curation of the reaction dataset was performed. Two reactions leading to unstable epoxy group products were removed, along with a reaction that swaps the connectivity of the two carbons in the ethylene group (CH 2 -CH 2 -R), resulting in a product that is identical to the reactant. It was detected because it involves a connectivity change, but it cannot be considered a reaction path for, e.g., a mechanism.