You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 6-(3-methoxyphenyl)-3-(3-oxo-3-phenothiazin-10-ylpropyl)-2-sulfanylidene-1,3-thiazin-4-one .
user
C26H20N2O3S3
assistant