DePierre v. United States
DePierre v. United States, 564 U.S. 70 (2011), was a case in which the Supreme Court of the United States held that the use of the term "cocaine base" in 21 U.S.C. § 841(b)(1) refers to cocaine in its chemically basic form.
Source: Wikipedia — DePierre v. United States (CC BY-SA 4.0)