To secure regulatory approval for the deal, the U.S. Department of Justice required Germany-based pharmaceutical and plant and animal health manufacturer Bayer to divest of assets that currently compete with agrichemical giant Monsanto. That includes Bayer CropScience 's Liberty herbicide business — a key competitor with St. Louis-based Monsanto's Roundup product — that the company produces at a sprawling industrial complex at 1740 Whitehall Road in Muskegon Township.