4-((1S,2S)-1,2-dihydroxy-2-((2R,6S,9S,11R,12R,14aS,15S,16S,20S,23S,25aS)-2,11,12,15-tetrahydroxy-6,20-bis((R)-1-hydroxyethyl)-16-methyl-5,8,14,19,22,25-hexaoxo-9-(4''-(pentyloxy)-[1,1':4',1''-terpheny