Chemical structure and biological activity 



0-}p.j)m. 



7p.p.Ta. 



Wp.p.ia. 



Ace/ic Propionic Bufyric Valeric Capro/c Hepfanolc 



Figure 1. Activities ofu)-{2-A-dichlorophenoxy)alkanecarboxylic acids in the pea curvature test. 



Acetic Propionic Butyric 



Valeric 



Capro/c Heptonoic 



Acids 



Amides 



Nitriles 



lU*Li»L» 



■p-fXTri. — ► 



Figure 2. Histograms showing activities of io-{2-A-dichlorophenoxy)alkanecarboxylic acids and their 

 corresponding amides and nitrites in the wheat cylinder test. 



190 



