You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 3-[5-chloro-2-[2-[(1-methylbenzo[e][1,3]benzoxazol-1-ium-2-yl)methylidene]butylidene]-1,3-benzothiazol-3-yl]propane-1-sulfonic acid ?
user
C27H26ClN2O4S2+
assistant