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 (1S,3R)-1-(3,4-dichlorophenyl)-2-methyl-1,3,4,9-tetrahydropyrido[3,4-b]indole-3-carboxylic acid ?
user
C19H16Cl2N2O2
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