9-{[(2E)-4-[(2S,3R,4R,5S)-3,4-dihydroxy-5-{[(2S,3S)-3-[(2S,3S,16E)-18-[(2S,3R,4R,5S)-3,4-dihydroxy-5-{[(2S,3S)-3-[(2S,3S)-3-hydroxybut-2-yl]oxiran-2-yl]methyl}-3,4,5,6-tetrahydro-2H-pyran-2-yl]-3,17-dimethyl-5,15-dioxo-4,14-dioxaoctadec-16-en-2-yl]oxiran-2-yl]methyl}-3,4,5,6-tetrahydro-2H-pyran-2-yl]-3-methyl-1-oxobut-2-enyl]oxy}nonanoic acid