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