In recent years, OPSIN (Open Parser for Systematic IUPAC Nomenclature) has been developed as the only open-source rule-based system for parsing IUPAC names into SMILES strings. It uses a regular grammar approach to guide tokenisation and constructs an XML parse tree from the IUPAC name, which is then processed to reconstruct the chemical structure. In this work, we use OPSIN to retranslate the IUPAC names generated by STOUT.