(7aR,9aR,21aS,21bR)-1,2,3,9,13,14,15,16,17,18,25,26,30,33-tetradecahydroxy-7,7a,9,9a,21a,21b-hexahydro-5H,23H-29,31-(ethanediylidene)chromeno[4,5-de]dibenzo[6',7':8',9'][1,4]dioxecino[2',3':4,5]pyrano[3,2-i][1,8,12]benzotrioxacyclopentadecine-5,11,20,23,2