You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule ethane;9-ethyl-10-methyl-6-methylidene-7-[(2-methylquinolin-3-yl)methyl]-5H-pyrido[2,3-c]carbazole into molecular formula.
user
C32H33N3
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