Fig. 2
From: A general approach for retrosynthetic molecular core analysis
Construction of a core–molecule network for an exemplary dataset. Each molecule is connected to all of its putative cores. Thus, series can be formed if at least two molecules share a core. Note that not all molecules in a series need be pairwise analogs of each other, but a sequence of analogs must exist. For this example, only putative cores mapping to more than a single molecule are included