You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S,3'R,5'R)-5'-(2-hydroxyethyl)-3'-methyl-1-[[3-(2-oxoazetidin-1-yl)phenyl]methyl]spiro[indole-3,2'-oxolane]-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H26N2O4
assistant