Semduramicin

2-((2R,3S,4S,5R,6S)-2,4-dihydroxy-6-((R)-1-((2S,5R,7S,8R,9S)-9-hydroxy-2-((2S,2'R,3'S,5R,5'R)-5'-((2S,3S,5R,6S)-6-hydroxy-3,5,6-trimethyltetrahydro-2H-pyran-2-yl)-3'-(((2S,5S,6R)-5-methoxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-2-methyloctahydro-[2,2'-bifuran]-5-yl)-2,8-dimethyl-1,6-dioxaspiro[4.5]decan-7-yl)ethyl)-5-methoxy-3-methyltetrahydro-2H-pyran-2-yl)acetic acid