You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 4-methyl-5-[(2-phenyltriazol-4-yl)methyl]-2,3,3a,4,6,6a-hexahydro-1H-pyrrolo[3,4-c]pyrrole ?
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C16H21N5
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