You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,8,9,10-tetrahydroxy-12-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-[[(2R,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyloxan-2-yl]oxymethyl]oxan-2-yl]oxynaphtho[1,2-c]isochromen-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H30O16
assistant