You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (6aS,7S,10aS)-4-(3H-benzimidazol-5-yl)-10a-(4-methoxyphenyl)-2,7-dimethyl-5,6,6a,7,9,10-hexahydrobenzo[h]quinazolin-8-one ?
user
C28H28N4O2
assistant