You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 4-(7,8-dimethoxy-3H-pyrazolo[3,4-c]quinolin-1-yl)-1-methyl-6-(1-methylcyclohexa-2,4-dien-1-yl)cyclohexa-2,4-diene-1-carbonitrile ?
user
C27H26N4O2
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