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 N-[(1R,2S,6R,14R,15R,16S)-11,15-dimethoxy-5-methyl-13-oxa-5-azahexacyclo[13.2.2.12,8.01,6.02,14.012,20]icosa-8(20),9,11,18-tetraen-16-yl]acetamide .
user
C23H28N2O4
assistant