You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R)-1-[8-methoxy-7-(3-pyrrolidin-1-ylpropoxy)-5H-pyrido[4,3-b]indol-1-yl]pyrrolidin-3-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H30N4O3
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