You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3S,5S,8R,9S,10S,13R,14S,17S)-5,14-dihydroxy-3-[(2S,4S,5R,6S)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-13-methyl-17-(5-oxo-2H-furan-3-yl)-2,3,4,6,7,8,9,11,12,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-10-carbaldehyde The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H44O9
assistant