classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/ZA-200404693-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FI-61579-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/HK-1082722-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FI-61579-C |