You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (4aR,5S,5aR,6R,12aR)-3,5,10,11,12a-pentahydroxy-6-methyl-1,12-dioxo-9-pyridin-2-yl-3,4,4a,5,5a,6-hexahydro-2H-tetracene-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C25H24N2O8
assistant