D059004Chemicals & DrugsD27.505.519.389.892.500D27.505.954.248.794.500Topoisomerase I Inhibitorsprns:meshDescriptorUIMeSH DescriptorUIprns:meshSemanticGroupNameMeSH semantic group nameprns:meshTreeNumberMeSH tree numberrdf:typetyperdfs:labellabelConcept