You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule ethyl (2E,5S)-5-(4-methoxyphenyl)-2-[[(4S)-3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl]methylidene]-3-oxo-7-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate .
user
C33H28N4O5S
assistant