(4E,6E,8Z,10E,14E,16E)-3-[(4-amino-3,5-dihydroxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl)oxy]-19-[(4,5-dihydroxy-6-methyl-3,4,5,6-tetrahydro-2H-pyran-2-yl)oxy]-25,27,29,33,35,37-hexahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10,14,16-hexaene-38-carboxylic acid