Salts or esters of carbamic acid,
H2NC(=O)OH
, or of
N-substituted carbamic acids
R2NC(=O)OR'
, (
R' = hydrocarbyl or a cation). The esters are often called urethanes or urethans, a usage that is strictly correct only for the ethyl esters.
Source:
PAC, 1995, 67, 1307. 'Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)' on page 1323 (https://doi.org/10.1351/pac199567081307)