You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-amino-2-[2-[(2-chloro-4-nitrophenanthridin-6-yl)amino]-1-hydroxyethyl]-7-[3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-6-hydrazinylpyrrolo[2,3-d]pyrimidine-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H27ClN10O8
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