... 2-Propylpentanamide (Valpromide ® ; AD1) was synthesized according to Fischer and Dilthey (1902); N,N-dipropyl 2-propylpentanamide (AD2): Benoit-Guyod et al. (1965); 1-cycloheptenoic acid (SA1): Einhorn and Willstaetter (1894); cyclooctanoic acid (SA2): Ruzicka and ...