You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-[(2R)-2-[[5-(3-amino-3-oxopropyl)-4-methyl-1,2,4-triazol-3-yl]sulfanyl]propanoyl]phenyl]-2-methylpropanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H25N5O3S
assistant