You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (5S,8S,9S,10S,13R,14S,16R)-1,1,2,10,13-pentamethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-16-ol .
user
C22H38O
assistant