Wiktionary
fenoprop
n. 2-(2,4,5-trichlorophenoxy)propionic acid, a herbicide formerly used to control woody plants and broadleaf weeds.
Wikipedia
Fenoprop
Fenoprop, or 2-(2,4,5-trichlorophenoxy)propionic acid, is an herbicide and a plant growth regulator. Fenoprop has been banned from use as an herbicide in the United States since 1985. The name Silvex was used in the USA. The name 2,4,5-TP is used in France and was used in the former USSR (2,4,5-ТП).
Fenoprop was once used as an herbicide for control of woody plants and broadleaf weeds.