denotes symbol local chemical structure symbol local chemical structure identifier In publications of chemical reseach the chemical structure descriptors, e.g. chamical graphs, are often labeled with short names, the local chemical structure symbols, to be more easily referenced in other sections of the publication or supplementary data. A symbol that is used within a particular local context to denote the descriptor, e.g. a chemical graph, that is used within this context to refer to a specific chemical structure. structural descriptor