You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance methyl N-[(1R,9R,13E)-13-ethylidene-5-methoxy-11-oxo-6-azatricyclo[7.3.1.02,7]trideca-2(7),3,5-trien-1-yl]carbamate .
user
C17H20N2O4
assistant