You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-[1-(2,4-dimethylphenyl)tetrazol-5-yl]sulfanyl-N-(ethylcarbamoyl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H20N6O2S
assistant