You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (2R)-N-cyclopropyl-2-phenyl-2-[(2S)-2-(1,2,4-triazol-1-ylmethyl)piperidin-1-yl]acetamide into its molecular formula.
user
C19H25N5O
assistant