dioxygen hydridodioxygen(1+) MYMOFIZGZYHOMD-UHFFFAOYSA-O [HO2](+) InChI=1S/O2/c1-2/p+1 [H][O+]=O Gmelin:508 HOO(+) chebi_ontology CHEBI:29793 HO2 hydridodioxygen(1+) 32.99711 dioxidenium HO2(+) +1 33.00674 oxygen hydride