A labeled metabolite of Mycophenolic Acid, an antibiotic produced by Penicillium brevi-compactum, P. Stoloniferum and related spp. A selective inhibitor of lymphocyte proliferation by blocking inosine monophosphate dehydrogenase, an enzyme involved in the de novo synthesis of purine nucleotides.Form:White to Off-White SolidSolubility:Chloroform, Methanol