[{"from": "human", "value": "Please give me some details about this molecule. [C][C][O][C][=Branch1][C][=O][N]"}, {"from": "gpt", "value": "The molecule is an ester of carbamic acid.  It is not a component of polyurethanes.  Urethane can be produced by the reaction of ammonia with ethyl chloroformate or by heating urea nitrate and ethyl alcohol. It was first prepared in the mid 1800\u2019s. Ethyl carbamate was used as an antineoplastic agent in the treatment of multiple myeloma before it was found in 1943 to be toxic, carcinogenic and largely ineffective. Japanese usage in medical injections continued and from 1950 to 1975. Ethyl carbamate has now been withdrawn from pharmaceutical use. However, small quantities of ethyl carbamate are also used in laboratories as an anesthetic for animals. Studies have shown that most, if not all, yeast-fermented alcoholic beverages contain traces of ethyl carbamate (15 ppb to 12 ppm). Other foods and beverages prepared by means of fermentation also contain ethyl carbamate. For example, bread has been found to contain 2 ppb while as much as 20 ppb has been found in some samples of soy sauce.  \u201cNatural\u201d ethyl carbamate is formed during distillation from natural precursors such as cyanide, urea, citrulline and other N-carbamoyl compounds.\n"}]