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 [(5'S,6R,7S,9S,13S,16S)-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-16-yl] 4-[(4-methoxyphenyl)methyl]piperazine-1-carboxylate .
user
C40H60N2O5
assistant