You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule [1-[(3aS,7aR)-1,2,3,4,5,6,7,7a-octahydroisoindole-3a-carbonyl]piperidin-4-yl]-piperidin-1-ylmethanone;hydrochloride ?
user
C20H34ClN3O2
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