You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
copper;tetrasodium;3-[[(Z)-N-(2-carboxy-5-sulfonatophenyl)azanidyl-C-[4-(2-chloroethylsulfonyl)phenyl]carbonimidoyl]diazenyl]-4-hydroxy-5-[[C-oxido-N-[2-(2-sulfonatooxyethylsulfonyl)ethyl]carbonimidoyl]amino]benzenesulfonate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H24ClCuN6Na4O18S5+
assistant