You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-N-(2-methoxyphenyl)-2-N,4-N-dimethyl-4,5,6,7-tetrahydro-1,3-benzothiazole-2,4-diamine into its molecular formula.
user
C16H21N3OS
assistant