You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-[6-[6-[6-(3,8-dihydroxy-3-methyl-1,7,12-trioxo-2,4-dihydrobenzo[a]anthracen-9-yl)-3-hydroxy-2-methyloxan-4-yl]oxy-2-methyloxan-3-yl]oxy-2-methyloxan-3-yl]oxy-3-oxopropanoic acid .
user
C40H46O15
assistant