You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3,5,10,13-tetramethyl-17-(6-methylheptan-2-yl)-1,2,3,4,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthrene is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H52
assistant