You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethane;6-methyl-3,4-dihydro-2H-1,4-benzoxazine;10-methyl-2-oxa-8-azatricyclo[7.3.1.05,13]trideca-1(13),5,7,9,11-pentaene is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H34N2O2
assistant