You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
17-(5,6-dimethylhept-2-en-2-yl)-10,13-dimethyl-2,3,4,5,6,7,8,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-3,6-diol is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H46O2
assistant