The pharmaceutical industry affords some protection from genericization of trade names with the modern practice of assigning a nonproprietary name for a drug based upon chemical structure. Brand-name drugs have well-known nonproprietary names from the beginning of their commercial existence, even while still under patent, preventing the aforementioned problem of "no alternative generic name for the idea readily coming to mind". For example, even when Abilify was new, its nonproprietary name, Aripiprazole, was well documented. Another example is Warfarin, which was known as an ingredient in rat poison before it was approved for human use under the brand name of Coumadin.