You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(1-ethylpiperidin-4-yl)-4-propan-2-yl-N-(2-pyridin-2-ylethyl)thiadiazole-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H29N5OS
assistant