You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (1S,9S)-11-[[(3S,3aS,4aR,5R,8aR,9aR)-8a-methyl-2-oxospiro[3a,4,4a,6,7,8,9,9a-octahydro-3H-benzo[f][1]benzofuran-5,2'-oxirane]-3-yl]methyl]-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one into its molecular formula.
user
C26H34N2O4
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