You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[9-(4-acetylphenyl)-5a,5b,8,8,11a-pentamethyl-1-prop-1-en-2-yl-1,2,3,4,5,6,7,7a,11,11b,12,13,13a,13b-tetradecahydrocyclopenta[a]chrysen-3a-yl]-1-methyl-1-(2-pyrrolidin-1-ylethyl)urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C45H67N3O2
assistant