2-Butyloctanoic acid 2-Butyloctansaeure [German] 27610-92-0 4-02-00-01112 (Beilstein Handbook Reference) 5-Undecanecarboxylic acid 53687-45-9 BRN 1765736 EINECS 248-570-1 OCTANOIC ACID, 2-BUTYL-