You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (1R,3aS,3bS,4R,9aR,9bS,11aR)-4,9a,11a-trimethyl-1-[(2R)-6-methylheptan-2-yl]-1,2,3,3a,3b,4,6,8,9,9b,10,11-dodecahydroindeno[5,4-f]quinolin-7-one is given. What is its corresponding molecular formula?
user
C27H45NO
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