153248-53-4 (1S,2S)-1-((2R,3R,4S,6S)-3-acetamido-4-acetoxy-6-((1-acetyl-5-bromo-4-chloro-1H-indol-3-yl)oxy)-6-(methoxycarbonyl)tetrahydro-2H-pyran-2-yl)propane-1,2,3-triyl triacetate