volatile organic compound ether diethyl ether ethoxyethane 1,1'-oxybisethane aether pro narcosi aether Ether Aether diethyl oxide Ether 1,1'-oxydiethane Diethylaether Diethyl ether ethyl oxide 3-oxapentane Pronarcol R-610 ethyl ether 1,1'-oxydiethane Anesthetic ether An ether in which the oxygen atom is linked to two ethyl groups. inhalation anaesthetic non-polar solvent refrigerant