You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-amino-N-[2-chloro-5-[4-[2-(4-methylpiperazin-1-yl)ethylsulfinyl]piperazin-1-yl]phenyl]-1,3-oxazole-4-carboxamide into its molecular formula.
user
C21H30ClN7O3S
assistant