You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-hydroxy-4-methoxyphenyl)-3-[3-hydroxy-2-methoxy-5-[(Z)-2-(3,4,5-trimethoxyphenyl)ethenyl]phenyl]iminopropan-1-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H29NO8
assistant