You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(3R,5S,7R,10S,13R,17R)-3,7-dihydroxy-10,13-dimethyl-12-oxo-1,2,3,4,5,6,7,8,9,11,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid;4-[(3R,5S,10S,12S,13R,17R)-3,12-dihydroxy-10,13-dimethyl-7-oxo-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid;4-[(5R,10S,13R,17R)-10,13-dimethyl-3-oxo-1,2,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid;4-[(3R,5S,10S,13R,17R)-3-hydroxy-10,13-dimethyl-7-oxo-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid;4-[(3R,5R,10S,13R,17R)-3-hydroxy-10,13-dimethyl-12-oxo-1,2,3,4,5,6,7,8,9,11,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C120H190O21
assistant