PLANT HORMONES 



207 



Table 23. A List of Physiologically-Active Acids Known and Available in 1935 



CHoCOOH 



NH 

 X\ CHaCHjCOOH 



NH 



CH2CH2CH2COOH 



3-Indoleacetic acid 



/3-(3-Indole)-propionic acid 



7-(3-Indole)-n-butyric acid 



/XCH^COOH 



/XCHjCHjCOOH 



/\CH:CHCOOH 



CH2COOH 



Phenylacetic acid 



/3-(Phenyl)-propionic acid 



Phenylacrylic acid 

 (cinnamic acid) 



a-Naphthaleneacetic acid 



H2C — CH2 



H2COOH 



CH, 



Acenaphthene-(5)-acetic acid 



— CH2COOH Fluoreneacetic acid 



— CH2COOH Anthraceneacetic acid 



