You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2S)-3-(3,4-dihydro-1H-isoquinolin-2-yl)-2-hydroxypropyl]-5-(oxolan-3-ylamino)pyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28N4O3
assistant