In Step 3, the reaction is (a) 4 p-disrotatory electrocyclization (b) 6 p-disrotatory
Chapter 30, Problem 30(choose chapter or problem)
In Step 3, the reaction is (a) 4 p-disrotatory electrocyclization (b) 6 p-disrotatory electrocyclization (c) 4 p2 p suprafacial cycloaddition (d) suprafacial 1,5-hydrogen shift
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