| gsrs_all | Retrieve comprehensive GSRS data for a set of UNIIs |
| gsrs_browse | Browse all substance records in GSRS |
| gsrs_chem_info | Retrieve chemical structure information by substance name or CAS number |
| gsrs_codes | Retrieve external codes and identifiers for GSRS substances |
| gsrs_hierarchy | Retrieve the relationship hierarchy for GSRS substances |
| gsrs_names | Retrieve all names (synonyms) for GSRS substances |
| gsrs_search | Search the GSRS substance database |
| gsrs_structure | Retrieve chemical structure data for GSRS substances |
| gsrs_structure_search | Search GSRS by chemical structure |
| gsrs_substance | Fetch a GSRS substance record by UNII |
| gsrs_unii_from_name | Look up UNII codes for substance names |
| gsrs_vocabularies | Retrieve controlled vocabulary terms from GSRS |
| write_dataframes_to_excel | Write a named list of data frames to an Excel workbook |