You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3R,4R,5R,8S,9S,10S,11R,13R,14S,16S,17Z)-4-amino-3,11-dihydroxy-4,8,10,14-tetramethyl-17-[2-oxo-1-(3-propan-2-ylidenecyclopentyl)propylidene]-1,2,3,5,6,7,9,11,12,13,15,16-dodecahydrocyclopenta[a]phenanthren-16-yl] acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H53NO5
assistant