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(5S)-5-[(1S,3R,6R,8R,10S,13S,17S)-3,17-Dihydroxy-8,10,13,18,18-pentamethyl-5-oxapentacyclo[11.8.0.02,10.04,9.014,19]henicosan-6-yl]-4,4-dimethyl-1,3-dioxolan-2-one


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