You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as [1-[3-(2-aminoquinazolin-6-yl)-2,4-difluoroanilino]sulfanylpiperidin-4-yl]methanol using the IUPAC nomenclature.
user
C20H21F2N5OS
assistant