You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,4S,6S,9S,10R,12R,13S,17R,18S)-6-[(2R,4S,5R,6R)-5-[(2S,4R,5R,6R)-5-[(2S,4R,5R,6R)-5-[(2S,4S,5R,6R)-5-[(2S,4R,5R,6R)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]peroxy-4-methoxy-6-methyloxan-2-yl]oxy-9,13,18-trimethyl-19,20-dioxapentacyclo[10.7.1.01,10.04,9.013,17]icosan-14-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C56H92O20
assistant