You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1,4a-dimethyl-2,3,4,5,6,9,10,10a-octahydrophenanthren-1-yl)methanol;2,2-dimethylpropane;propane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H46O
assistant