methyl 2-(((52R,53R,54S,55R,56S)-53-hydroxy-14,15,16,25,26,55-hexamethoxy-3,8-dioxo-56-((3,4,5-trimethoxybenzoyl)oxy)-53,54,55,56-tetrahydro-52H-4,7-dioxa-5(4,2)-pyrana-1,2(1,2)-dibenzenacyclooctaphane-24-yl)oxy)-3,4,5-trimethoxybenzoate