You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-(oxan-2-ylmethyl)-6,7,8,9-tetrahydro-5H-cyclohepta[d]pyrimidin-4-amine is given. What is its corresponding molecular formula?
user
C15H23N3O
assistant