Amidenin, a New Plant Growth-regulating Substance Isolated from Amycolatopsis sp.

Amidenin, a new plant growth-regulating substance, was isolated from the ferme The active principle was extracted with ethyl acetate and purified by silica gel column chromatography. The molecular formula of this substance was established as C10H17NO, and the structure was determined to be 2E,4Z-decadienamide by spectroscopic analyses. This substance showed growth-promoting activity with a 0.6 x 10(-5)-1.8 x 10(-5) M treatment to rice seedlings, and inhibitory activity with a 6.0 x 10(-5) M treatment.