You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-N-[2-[2-[4-amino-7-(furan-2-yl)pyrazolo[1,5-a][1,3,5]triazin-2-yl]oxyphenyl]ethyl]-7-(furan-2-yl)pyrazolo[1,5-a][1,3,5]triazine-2,4-diamine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H21N11O3
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