You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[benzyl(methyl)amino]-2-oxoethyl]-N-(2,6-dichlorophenyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decane-8-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H31Cl2N5O3
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