You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[4-[(2R)-butan-2-yl]phenyl]sulfonyl-4-[(1-propyltetrazol-5-yl)methyl]piperazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H30N6O2S
assistant