You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (E)-5-[(1-hydroxy-1-phenylpropan-2-yl)amino]-1-(4-methoxy-3-nitrophenyl)pent-1-en-3-one ?
user
C21H24N2O5
assistant