You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R)-5-[(3R,5R,8S,9R,10S,13R,14R,17R)-3,5,8,9,10,13,14-heptamethyl-2,3,4,6,7,11,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-17-yl]hexan-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H52O
assistant