PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 21714592-5 2011 The classification in this review includes COX-2 inhibitors based on five- and six-membered heterocycles, benzoheterocycles (e.g., benzopyrans, benzopyranones, indoles and quinolines), quinones, chalcones, natural products and miscellaneous. Quinones 185-193 mitochondrially encoded cytochrome c oxidase II Homo sapiens 43-48 32942970-8 2021 According to the structural features, the natural COX-2 inhibitors were mainly divided into the following categories: natural phenols, flavonoids, stilbenes, terpenoids, quinones and alkaloids. Quinones 170-178 mitochondrially encoded cytochrome c oxidase II Homo sapiens 50-55 15134917-2 2004 In 10% methanol/water, the one-electron reduction of quinones L1 and L2 to the corresponding semiquinones is shifted to more positive potentials upon addition of one equivalent of Zn(II), Ni(II), Co(II) or Cd(II) and is consistent with formation of a 1:1 complex involving the quinone(N) and adjacent quinone(O). Quinones 53-61 mitochondrially encoded cytochrome c oxidase II Homo sapiens 196-202