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  • (2S,3S,4S,5S,6R,9S,11S)-9-Ethyl-2-((2S,3S)-2-hydroxy-3-methyl-hept-6-ynyl)-4-(4-methoxy-benzyloxy)-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

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