You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-methyl-1-[(5-pyrimidin-5-yl-1,2,3,4-tetrahydronaphthalen-2-yl)methyl]guanidine is given. What is its corresponding molecular formula?
user
C17H21N5
assistant