You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [(3R,8S,9R,10R,13S,14R)-10,13-dimethyl-17-oxo-1,2,3,4,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-yl] hydrogen sulfate by IUPAC nomenclature, provide its molecular formula.
user
C19H28O5S
assistant