You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1R,9S)-11-[(2S)-2-[(6-methyl-4-oxo-2,3-dihydro-1H-cyclopenta[c]chromen-7-yl)oxy]propanoyl]-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one into its molecular formula.
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C27H28N2O5
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