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 (9aS)-8-acetyl-N-[(2,6-dimethylnaphthalen-1-yl)methyl]-1,7-dihydroxy-3-methoxy-9a-methyl-9-oxodibenzofuran-4-carboxamide ?
user
C30H27NO7
assistant