35608-64-1 5405-41-4 AI3-11592 Butanoic acid, 3-hydroxy-, ethyl ester Butyric acid, 3-hydroxy-, ethyl ester EINECS 226-456-2 EINECS 252-642-8 Ethyl (1)-3-hydroxybutyrate Ethyl 3-hydroxybutanoate Ethyl 3-hydroxybutyrate Ethyl 3-hydroxybutyrate (natural) Ethyl beta-hydroxybutyrate FEMA No. 3428 NSC 42916 NSC 8115