You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (3aR,8bS)-7-[[5-methyl-4-[(2,2,4-trimethyl-3-oxo-1,4-benzoxazin-6-yl)amino]pyrimidin-2-yl]amino]-1,3a,4,8b-tetrahydroindeno[1,2-d][1,3]oxazol-2-one .
user
C26H26N6O4
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