You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (3aR,4S,8aS,8bS)-2-[2-(trifluoromethyl)phenyl]spiro[3a,6,7,8,8a,8b-hexahydropyrrolo[3,4-a]pyrrolizine-4,6'-indolo[2,1-b]quinazoline]-1,3,12'-trione into molecular formula.
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C30H21F3N4O3
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