Problem: The following synthesis was used to prepare 2 an intermediate for the synthesis of the alkaloid dendrobine, a neurotransmitter antagonist. The molecular formulae for 1 and 2 are provided. Which of the following is the structure of 2?

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The following synthesis was used to prepare 2 an intermediate for the synthesis of the alkaloid dendrobine, a neurotransmitter antagonist. The molecular formulae for 1 and 2 are provided. Which of the following is the structure of 2?