The Eighth Circuit has determined that in 2003, Missouri’s definition of cocaine included isomers not encompassed by the current federal definition. “Because Missouri’s definition of cocaine included positional isomers while the federal definition does not, the Missouri definition is unambiguously broader than its federal counterpart. Moreover, Missouri courts have interpreted the Missouri drug schedule as making all isomers of cocaine illegal.”
The full text of US v. Myers can be found here: