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(4S,4'S)-3,3'-(2,2'-((3S,4S)-2,2,5,5-tetramethyl-1,2,5-oxadisilolane-3,4-diyl)bis(acetyl))bis(4-isopropyloxazolidin-2-one)
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(4S,4'S)-3,3'-(2,2'-((3R,4R)-2,2,5,5-tetramethyl-1,2,5-oxadisilolane-3,4-diyl)bis(acetyl))bis(4-isopropyl-5,5-diphenyloxazolidin-2-one)
