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 (3aS,7aR)-N-methyl-N-[2-(4-methylanilino)-2-oxoethyl]-1,2,3,4,5,6,7,7a-octahydroisoindole-3a-carboxamide .
user
C19H27N3O2
assistant