You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[1-methyl-5-[(5-methyl-1H-pyrazol-3-yl)amino]-6-oxopyridin-3-yl]-2-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2-yl)pyridin-3-yl]methyl acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H31N7O4
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