You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[8-[2-chloro-3-[2-chloro-3-[6-methoxy-5-[[[(2S)-5-oxopyrrolidin-2-yl]methylamino]methyl]pyridin-2-yl]phenyl]phenyl]-6-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methyl]pyrrolidine-3-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C39H38Cl2N6O5
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