You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(2,5-diazatetracyclo[12.4.0.02,6.07,12]octadeca-1(18),3,5,7,9,11,14,16-octaen-13-yl)-11-hydroxy-5-oxa-1,2,8-triazatricyclo[8.4.0.03,8]tetradeca-10,13-diene-9,12-dione into molecular formula.
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C26H21N5O4
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