You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (3R,4aR,5aS,8aR,15aS,15bR)-3,4-dihydroxy-10,11-dimethoxy-2,3,4a,5,5a,7,8,13a,15,15a,15b,16-dodecahydro4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinolin-14-one by IUPAC nomenclature, provide its molecular formula.
user
C23H28N2O6
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