You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2S)-2-(1-phenyltetrazol-5-yl)sulfanyl-N-(5-propan-2-yl-1,3,4-thiadiazol-2-yl)butanamide by IUPAC nomenclature, provide its molecular formula.
user
C16H19N7OS2
assistant