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