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 identified by (1R,2R,4R)-N-ethyl-N-[2-(2-methoxyanilino)-2-oxoethyl]bicyclo[2.2.1]hept-5-ene-2-carboxamide ?
user
C19H24N2O3
assistant