You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule [(2S)-3-methyl-1-oxo-1-[3-(4-pyrimidin-5-ylphenyl)propylamino]butan-2-yl]imino-oxido-(thiophen-2-ylmethyl)phosphanium ?
user
C23H27N4O2PS
assistant