You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R,3S,4R,5R)-3-acetyloxy-5-hydroxy-2-[[(1S,3R,6R,8R,9S,11S,12S,14S,15S,16R)-14-hydroxy-15-[(2S,5S)-5-(2-hydroxypropan-2-yl)-2-methyloxolan-2-yl]-7,7,12,16-tetramethyl-9-[(2S,3S,4S,5S)-3,4,5-trihydroxyoxan-2-yl]oxy-6-pentacyclo[9.7.0.01,3.03,8.012,16]octadecanyl]oxy]oxan-4-yl] acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C44H70O15
assistant