You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,4aS)-2-amino-4-(2-hydroxynaphthalen-1-yl)-4a,5,6,7-tetrahydro-4H-naphthalene-1,3,3-tricarbonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H18N4O
assistant