Diels-alder also brings to light an additional corroborating observation. Diels-alder shares similarities with reduction, because the double bond at the reaction center is reduced to a single bond as the ring closes to make the resulting product adduct. Evidently this makes the reaction vector for diels-alder face the opposite direction to oxidation reaction vectors as can be seen from Table , where the cosine similarity between diels-alder and for instance alkane oxidation is -0.73. This can also be seen in the PC projection of the reaction vectors in Figure when compared with that for oxidation, Figure . Therefore, even though diels-alder is not technically a reduction via adding hydrogens, it is highly colinear with reduction which once again points to a highly organized space. It has been observed in past work that SchNet's modeling of chemistry is interpretable based on chemical bondorder. Our results put their findings in a larger framework based in the implicit chemical syntactical relationship between the embedding's various subspaces.