You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(4aR,10aR)-3,8-bis(diethylamino)-4a,10a-dihydrophenoxazin-10-yl]-(3,5-ditert-butyl-4-hydroxyphenyl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H49N3O3
assistant