You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-[(1-benzylpyrazol-4-yl)methyl]-N'-methyl-1,3,3a,4,5,6,7,7a-octahydro-4,7-epoxyisoindole-2-carboximidamide ?
user
C21H27N5O
assistant