You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,3aS,7aS)-5-(4-hydroxy-2-methylphenyl)-7a-methyl-1,2,3,3a,6,7-hexahydroinden-1-ol is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H22O2
assistant