You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dichloro-5-methyl-6a,7,9,10-tetrahydro-[1,4]oxazino[3,4-h]pteridin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C10H10Cl2N4O2
assistant