You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[(Z)-1-(1,3-benzothiazol-6-yl)-3-oxoprop-1-en-2-yl]-3-(2-hydroxy-2-phenylethyl)-2-methylguanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H20N4O2S
assistant