Name one synthetic auxin that can be used as a herbicide. Give one more application of the same

Some of the synthetic auxins are used as herbicide.
2, 4- dichlorophenoxy acetic acid (2, 4-D) is a
dicotyledonous weed killer. 2, 4-D is used to kill 1 broad leaved weeds.
It is used to induce flowering in pineapple and litchi