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  • Methyl (4aS,6aR,6bS,13aS,15aR,15bR)-2,2,6a,6b,9,9,13a-heptamethyl -15-oxo-1,3,4,5,6,6a,6b,7,8,8a,9,13,13a,15,15a,15b-hexadecahydrop iceno[2,3-d][1,2]oxazole-4a(2H)-carboxylate

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