You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3R)-1-(2-chloro-7-morpholin-4-ylquinazolin-4-yl)piperidin-3-yl]-1,3-thiazole-2-sulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H23ClN6O3S2
assistant