1-Ethoxy-3-methylbutane 4-01-00-01681 (Beilstein Handbook Reference) 628-04-6 BRN 1731792 Butane, 1-ethoxy-3-methyl- (9CI) Ether, ethyl isopentyl Ethyl isoamyl ether Ethyl isopentyl ether Isopentyl ethyl ether