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 [(1R,2R,3R,4S,5R,6S,8R,9R,10R,13R,16S,17R,18S)-11-ethyl-8,9-dihydroxy-4,6,16,18-tetramethoxy-11-azahexacyclo[7.7.2.12,5.01,10.03,8.013,17]nonadecan-13-yl]methyl 2-acetamidobenzoate .
user
C34H48N2O9
assistant