You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-[2-[(8S,13R,14S,16S)-13-methyl-3-oxo-2,6,7,8,11,12,14,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-16-yl]ethoxy]-2-oxoethyl] heptanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H42O5
assistant