You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[2-[[(2S)-2-(1,3-benzothiazol-2-yl)pyrrolidin-1-yl]methyl]-4-oxoquinazolin-3-yl]acetamide .
user
C22H21N5O2S
assistant