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,2'R,3aS,7R,7aS)-2',7,7a-trimethyl-5'-methylidenespiro[3,3a,4,5,6,7-hexahydro-1H-indene-2,1'-cyclopentane]-1-ol .
user
C17H28O
assistant