You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
magnesium;4-[[4-[(2-amino-5-methyl-4-oxo-3,6,7,8-tetrahydropteridin-6-yl)methylamino]benzoyl]amino]-5-hydroxy-5-oxopentanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H48MgN14O12
assistant