4-Methyl-5,7-dihydroxyisobenzofuran-1(3H)-one

5,7-Dihydroxy-4-methylphthalide is a possible impurity of Mycophenolate Mofetil (M831450) which is an immunosuppressant.

ChEBI: 5,7-dihydroxy-4-methylphthalide is a member of the class of 2-benzofurans that is 1,3-dihydro-2-benzofuran substituted by oxo, methyl, hydroxy and hydroxy groups at positions 1,4,5, and 7, respectively. It is a natural product found in several genera of fungi including Eurotium repens. It has a role as an Aspergillus metabolite, a Penicillium metabolite and an impurity. It is a member of phenols, a gamma-lactone and a member of 2-benzofurans.