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Spiro[2.3]hexan-5-one structure
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Spiro[2.3]hexan-5-one
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Cyclopropane-cyclobutane system Ketone Small-ring building block Pharmaceutical intermediate
spiro[3.3]heptan-2-one structure
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spiro[3.3]heptan-2-one
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2-oxaspiro[3.3]heptan-6-one structure
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2-oxaspiro[3.3]heptan-6-one
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Oxaspiro scaffold Ketone Spirocyclic building block Pharmaceutical intermediate