You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(10R,13S,17R)-17-hydroxy-17-(1H-imidazol-5-yl)-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H30N2O2
assistant