You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (8S,9S,13S,14S)-17-(1-hydroxypropan-2-yl)-2-methoxy-13-methyl-6,7,8,9,11,12,14,15-octahydrocyclopenta[a]phenanthren-3-ol by IUPAC nomenclature, provide its molecular formula.
user
C22H30O3
assistant