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,3aR,5aS,7R,9aR,11aR)-6,6,9a,11a-tetramethyl-2,3a,4,5,5a,7,8,9,10,11-decahydro-1H-naphtho[1,2-g][1]benzofuran-1,7-diol .
user
C20H32O3
assistant