You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2S,3R,6aR,6bS,8aR,11R,12S,14R,14bS)-4,4,6a,6b,8a,11,12,14b-octamethyl-2,3,4a,5,6,7,8,9,10,11,12,12a,14,14a-tetradecahydro-1H-picene-1,2,3,14-tetrol is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H50O4
assistant