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http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-210113379-U
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2016134690-A3
broader http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21D23-14

Total number of triples: 285.