From the Court's decision:
As stated above, the Public Health Code includes within the definition of marijuana every compound and derivative of the plant or its seeds or resin. THC is the main psychoactive substance found in the cannabis plant. 11- carboxy-THC is a metabolite of THC in that it is produced when the body metabolizes THC...It is undisputed that THC and 11-carboxy-THC are identical except that in 11-carboxy- THC, two oxygen atoms are added to and three hydrogen atoms are removed from the eleventh carbon to make it more water soluble and easier to excrete.
Soouds like Michigan has criminalized the posession and consumption of cellulose and chlorophyl.