You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [4-[[8-[(2-carboxybenzoyl)amino]-1-hydroxy-3,6-disulfonaphthalen-2-yl]diazenyl]-3-hydroxyphenyl]-[4-[[8-[(2-carboxybenzoyl)amino]-1-hydroxy-3,6-disulfonaphthalen-2-yl]diazenyl]-3-hydroxyphenyl]imino-oxidoazanium;copper by IUPAC nomenclature, provide its molecular formula.
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C48H32Cu2N8O23S4
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