Chemistry Heterocyclic Building Blocks Spiroes Spiroes ∩ Epoxides
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tert-Butyl 1-oxa-5-azaspiro[2,5]octane-5-carboxylate
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tert-Butyl 1-oxa-6-azaspiro[2.5]octane-6-carboxylate
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tert-Butyl 1-oxa-5-azaspiro[2.4]heptane-5-carboxylate
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Ethyl 1-oxaspiro[2.5]octane-6-carboxylate