You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (7S,8aS)-7-pyrimidin-5-yloxy-1,2,3,4,6,7,8,8a-octahydropyrrolo[1,2-a]pyrazine .
user
C11H16N4O
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