描述
Azulene, also known as cyclopentacycloheptene or azulekeep, is a member of the class of compounds known as azulenes. Azulenes are polycyclic aromatic compounds containing the azulene skeleton, which consists of the cyclopentadiene ring fused to a cycloheptadiene ring. Azulene can be found in a number of food items such as anise, roman camomile, peppermint, and german camomile, which makes azulene a potential biomarker for the consumption of these food products. Azulene is a non-carcinogenic (not listed by IARC) potentially toxic compound. Azulene is an organic compound and an isomer of naphthalene. Whereas naphthalene is colourless, azulene is dark blue. Two terpenoids, vetivazulene (4,8-dimethyl-2-isopropylazulene) and guaiazulene (1,4-dimethyl-7-isopropylazulene), that feature the azulene skeleton are found in nature as constituents of pigments in mushrooms, guaiac wood oil, and some marine invertebrates . PAHs are carcinogens and have been associated with the increased risk of skin, respiratory tract, bladder, stomach, and kidney cancers. They may also cause reproductive effects and depress the immune system (L10) (T3DB).