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 [(1R,4S,5'R,6R,7S,8R,9S,13R,15R,16R)-15-acetyloxy-5',7,9,13-tetramethyl-19-oxospiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-16-yl] acetate .
user
C31H46O7
assistant