What is the active ingredient in the herbicide with the trade name 'milestone'?

Question

What is the active ingredient in the herbicide with the trade name 'milestone'?

Answer 1

Active ingredient is  aminopyralid.

Answer 2

aminopyralid

Answer 3

Milestone is a new herbicide from Dow AgroSciences. Milestone contains a new active ingredient, aminopyralid, which is a growth-regulator-type herbicide. Milestone contains 2 lbs of aminopyralid acid per gallon and will primarily be marketed for herbaceous weed control in pastures and rangeland. Milestone may be applied at rates ranging from 3 to 7 fluid ounces per acre. Milestone will provide control of a variety of annual broadleaf weeds and is also particularly effective on species like musk, bull, and Canada thistle. Additionally, Milestone provides good control of perennials like bull nettle or horsenettle and spotted knapweed, which has become more of a problem in some of the southwestern areas.

Milestone plus 2, 4-D is another prepackaged herbicide concept from Dow AgroSciences.  This mixture is expected to provide better control of certain perennial weeds like vervains, goldenrod, and ironweed compared to applications of Milestone alone.