You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[3-[(5S)-5-[(5S)-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-3,4-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-16-(2,5-dimethoxyphenyl)-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C41H60O13
assistant