classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/PL-112301-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ZA-200500370-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/PL-202562-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ZA-200506943-B |