You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2'S,5S,6'S,13'S)-13'-hydroxy-3-(3-methoxypropyl)-6',10'-dimethyl-17'-(2-phenylbenzoyl)spiro[1,3-oxazolidine-5,5'-tricyclo[13.2.2.02,6]nonadeca-1(17),9,15,18-tetraene]-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C40H47NO5
assistant