Borate(1-),[(1R,2R,5S,6R,8S,9E,12R,14S,17R,18R,19R,22S,23R,25S,26E,29R,31S,34R)-1,2,18,19-tetra(hydroxy-kO)-12,29-dihydroxy-6,13,13,17,23,30,30,34-octamethyl-4,7,21,24,35,37-hexaoxapentacyclo[29.3.1.1