Question: Ambrettolide is obtained from hibiscus and has a musk-like odor. Its preparation from a compound A is outlined in the table that follows. Write structural

Ambrettolide is obtained from hibiscus and has a musk-like odor. Its preparation from a compound A is outlined in the table that follows. Write structural formulas, ignoring stereochemistry, for compounds B through G in this synthesis. (Hint: Zinc, as used in step 4, converts vicinal dibromides to alkenes.)

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