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(1S,2R,7R,8S,9R)-8-[(3-Oxo-1,5-dihydro-2,4,3lambda5-benzodioxaphosphepin-3-yl)oxy]-7-phenylmethoxyspiro[3,5,10,12-tetraoxatricyclo[7.3.0.02,6]dodecane-11,1'-cyclohexane]-4-one


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