You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[2-[4-[(2R,4S,5S,6R)-4-[4-(hydroxymethyl)phenyl]-5-methyl-6-[[4-(4-nitrophenyl)piperazin-1-yl]methyl]-1,3-dioxan-2-yl]phenyl]phenyl]methyl]isoindole-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C44H42N4O7
assistant