You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(3-ethylbenzo[g][1,3]benzothiazol-2-ylidene)-2-[2-[(3-ethylbenzo[g][1,3]benzothiazol-2-ylidene)amino]-2-oxoethoxy]acetamide into molecular formula.
user
C30H26N4O3S2
assistant