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(1S,6R,7S,10R,12S,13R,15R,18S)-7,15-Dihydroxy-12,13,17,20,20-pentamethyl-18-(tritiomethylsulfanyloxy)-2,4,9-trioxapentacyclo[14.3.1.01,5.06,13.07,10]icos-16-ene-3,14-dione


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