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 5-[3-[[2-chloro-4-[(2S,3R,4S,5S,6R)-4,5-dihydroxy-6-(hydroxymethyl)-2-methoxyoxan-3-yl]oxycarbonyl-5-methoxyphenoxy]methyl]phenyl]-4-oxopentanoic acid .
user
C27H31ClO12
assistant