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?? ???? >2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester
2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester
2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester ??
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2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester C??? ??, ??, ??
2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester ?? ?? ? ???
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2,6,6-Trimethyl-3-hydroxy-3-tert-butyl-4-heptenoic acid tert-butyl ester ?? ??
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