You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[[(4S)-2-amino-4-phenyl-4,5-dihydroimidazol-1-yl]sulfonyl]-N-butyl-2,3-dihydroindole-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H27N5O3S
assistant