Salts or @E02219@ of carbamic acid, H2NC(=O)OH, or of N-substituted carbamic acids R2NC(=O)OR', (R' = hydrocarbyl or a @C00907@). The @E02219@ are often called @U06578@ or urethans, a usage that is strictly correct only for the ethyl @E02219@.
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1323 [Terms] [Paper]