You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (6R,6aR,9R)-6-(4-chlorophenyl)-9-(furan-2-yl)-5,6,6a,8,9,10-hexahydrobenzo[b][1,4]benzodiazepin-7-one ?
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C23H19ClN2O2
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