You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule methyl 3-[(6aS,7S)-9-cyano-7-methyl-8-oxo-2-phenyl-5,6,6a,7-tetrahydrobenzo[h]quinazolin-10a-yl]benzoate ?
user
C28H23N3O3
assistant