tehniline termin karbaamhapete estritele üldvalemiga R2NC(=O)OR' (R' ≠ H), an alternative term for the compounds R2NC(=O)OR' (R' ≠ H),  esters  of carbamic acids, R2NC(=O)OH, in strict use limited to the ethyl  esters, but widely used in the general sense, e.g. 'polyurethane resins'