You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (1S,9S)-1-hydroxy-5,5,9,11,11-pentamethyltricyclo[7.3.1.02,7]tridec-2(7)-en-3-one using the IUPAC nomenclature.
user
C18H28O2
assistant