The nomenclature used for named reactions in text mining software from NextMove. While it's proprietary, there are a few publications listing parts. 487/1,855 have mappings to the Reaction Ontology (RXNO).
namerxn
Get the homepage:
>>> import bioregistry as br >>> br.get_homepage("namerxn") 'https://www.nextmovesoftware.com/namerxn.html'