You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-(4-hydroxy-3-methoxy-5-nitrophenyl)-6,6-dimethyl-4,5,7,9-tetrahydrotetrazolo[5,1-b]quinazolin-8-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H18N6O5
assistant