1-(2-Ethoxyethoxy)butane 1-Butoxy-2-ethoxyethane 4-01-00-02382 (Beilstein Handbook Reference) 4413-13-2 BRN 1735161 Butane, 1-(2-ethoxyethoxy)- Butyl ethyl cellosolve Butylethylether ethylenglykolu [Czech] ETHANE, 1-BUTOXY-2-ETHOXY- Ethylene glycol butyl ethyl ether