You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[cyclobutanecarbonyl-[(6,6-dimethyl-2-bicyclo[3.1.1]heptanyl)methyl]amino]-4-hydroxy-N-(2-hydroxyethyl)-3,4,4a,9b-tetrahydrodibenzofuran-1-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H40N2O5
assistant