You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[2-[bis(carboxylatomethyl)amino]ethyl-[2-[bis(carboxylatomethyl)amino]-3-[2-(2-methyldecyl)-4,6-disulfonatophenoxy]propyl]amino]acetate;gadolinium(3+) by IUPAC nomenclature, provide its molecular formula.
user
C32H44GdN3O17S2-4
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