You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[4-methyl-6-(4-pyrrolidin-1-ylsulfonyl-1,4-diazepan-1-yl)pyrimidin-2-yl]phenol into its molecular formula.
user
C20H27N5O3S
assistant