(1) Lapachol, a quinone , is a recognized antitumor agent found in the wood and barely in the bark.(2) The formation of the dimers is strongly favored by the contiguous presence of quinone and hydroquinone.(3) The chemical formula for quinone is C 6 H 4 O 2, and its molecular weight is 108.1 grams per mole.(4) She said other researchers had shown that these ultrafine particles can carry toxic chemicals such as quinones and polycyclic aromatic hydrocarbons (PAHs).(5) Several kinds of compounds are activated under hypoxic conditions: aromatic and aliphatic N-oxides, quinones , nitroaromatics and organo-metallic compounds.(6) However, during infection and damage phenols and oxidases, such as peroxidase and tyrosinase, become decompartmentalized and could oxidize phenolic compounds to form antimicrobial quinones .(7) This organic fraction contains polycyclic aromatic hydrocarbons, halogenated aromatic hydrocarbons, and quinones , including reactive oxygen species that produce a strong oxidative stress response.
