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 [(3S,4S,5S,9R)-3,4-bis[(2-methylpropan-2-yl)oxy]-1-oxido-1-azoniaspiro[4.4]non-1-en-9-yl]methanol .
user
C17H31NO4
assistant