Azulene is a chemical compound that is derived from chamomile oil and exhibits a deep blue color. However, there are several synonyms for this compound that one might come across when researching or studying it. Some of the common synonyms for azulene include guaiazulene, 1,4-dimethyl-7-isopropylazulene, and 2,2'-methylenedi-(6-(1-methyl) ethenyl) azulene. Additionally, it is also known by different names in various languages, such as azulen in German and azuleno in Spanish. Despite the different names, these synonyms all refer to the same blue-colored compound that is used in various fields, including natural medicine, cosmetics, and dyes.