neoplasm-inducing chemical polycyclic arene 2010-11-01T01:07:01Z Any organic compound whose molecules are composed only of hydrogen, the element with atomic number 1, and carbon, the element with atomic number 12, and whose carbon atoms form continuous or closed chains linked by alternating double and single bonds that may be represented graphically by multiple interlinking circular or triangular forms. CHEBI:33848 XCO:0000093 experimental_condition_ontology mshimoyama polycyclic aromatic hydrocarbon polycyclic hydrocarbon