2-[(2E)-8-[5-(4,5-dihydroxy-4,6-dimethyl-oxan-2-yl)oxy-4-dimethylamino -6-methyl-oxan-2-yl]oxy-14-ethyl-10-hydroxy-15-[(5-hydroxy-3,4-dimetho xy-6-methyl-oxan-2-yl)oxymethyl]-1,5,9-trimethyl-4,12-dioxo-13,17-diox abicyclo[14.1.0]heptadec-2-en-7-yl]acetald