While analytical measurement is the gold standard for determining the abundance of products in a reaction at any given time point, presumably the balance of synthetic pathways which produce a compound and subsequent reactions which consume them govern the abundance of measurable compounds. The computed six generation FR network as a function of modeled reaction generation is shown in Figure , where node size represents the in-degree of the network (representing reactions which produce a given compound) or out-degree (representing reactions which consume a given compound). It can readily be appreciated how the FR may produce thousands of products, as evidenced by the FT-ICR-MS spectrum shown in Figure , though potentially in highly variable concentrations. generations colored by the out-degree of each compound. Zoomed insets in A and C show the fine-scale structure of the FR CRNR, demonstrating the large number of potential by-products which may contribute to the CRN's overall compositional diversity. The heavy weighting of the connections between the 5th and 6th generation products is evident. B and D show the species detected by Omran et al. in green.