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,10aR)-7-methyl-8-oxo-10a-(4-phenylmethoxyphenyl)-5,6,6a,7-tetrahydrobenzo[h]quinazoline-9-carbonitrile ?
user
C27H23N3O2
assistant