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,12aS)-4-(dimethylamino)-5,10,12a-trihydroxy-9-(5-imidazol-1-yl-2-methylpentan-2-yl)-6-methyl-1,3,11,12-tetraoxo-4,4a,5,5a,6,11a-hexahydrotetracene-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C31H38N4O8
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