3,4,4,6,7,15,16,17,18,19,20-undecahydroxy-2,9,13,22,27-pentaoxo-2,3,4,4a,9,11a,13,22,24,25,25a,27-dodecahydro-11H-3,5-epoxy-25,11-(epoxymethano)dibenzo[h,j]dibenzo[7,8:9,10][1,5]dioxacycloundecino[3,2-b][1,6]dioxacyclododecin-29-yl 3,4,5-trihydroxybenzoat