The "searching synthesis routes" function provides a retrosynthesis search, starting from one or multiple target molecules to be synthesized. In practice, multiple targets of similar molecules or isomers can be specified to gather as much relevant information as possible. Target molecules and feedstocks are specified by drawing molecular diagrams (Fig. .1). Users can also select feedstocks by types: "commercial", "hubs" and "renewables". Here "commercial" means commercially available molecules, "hubs" are the highly accessible molecules found by using ML and graph analysis, and "renewables" are molecules derived from biomass.