1,4-benzoquinones 103.990 104.063 Any member of the class of benzoquinones that is 1,4-benzoquinone or its C-substituted derivatives. C6O2R4 CHEBI:132124 O=C1C(*)=C(*)C(=O)C(*)=C1* a quinone chebi_ontology p-benzoquinones para-benzoquinones p-quinones quinone