Using our stochastic approach, we can identify the N lowestcost reaction pathways to the network products, ranked by a cost function that we have employed previously (see Methods). We selected two unexpected network products -LFEO and bi-dioxolylidene -and subjected their shortest pathways in order of cost to an automated procedure to identify the TS for each step along each pathway, allowing for the construction of complete reaction mechanisms. Figure highlights two formation paths obtained using this procedure, emphasizing the utility of network-generated reaction pathways to construct elementary mechanisms.