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methyl (1R,4S,10R,12S,14R,15R)-12-methyl-17-oxo-4-(prop-1-en-2-yl)-11,16,18,19-tetraoxapentacyclo[12.2.2.1~6,9~.0~1,15~.0~10,12~]nonadeca-6,8-diene-7-carboxylate related products: