You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-N',6-N'-bis[4-[6,7-dimethoxy-1-methyl-4-[(3-methyl-1,3-benzothiazol-2-ylidene)methyl]quinazolin-1-ium-2-yl]butyl]hexanediimidamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C54H66N10O4S2+2
assistant