What is the correct IUPAC name of the following compound?

6-bromo-6-ethoxy-7-hydroxy-2-iodo-2,5-dimethylcycloheptanecarbaldehyde

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3-bromo-3-ethoxy-2-hydroxy-7-iodo-4,7-dimethylcycloheptanecarbaldehyde

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6-bromo-6-ethoxy-7-hydroxy-2-iodo-2,5-dimethylcycloheptanemethanal

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3-bromo-3-ethoxy-2-hydroxy-7-iodo-4,7-dimethylcycloheptylmethanal

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Solution

The correct option is A 6-bromo-6-ethoxy-7-hydroxy-2-iodo-2,5-dimethylcycloheptanecarbaldehyde

Here, if we number the compound clockwise, we get substituents at 2 and 3,3. If we number it anti-clockwise, we get them at 2 and 2. This preceeds the clockwise way of numbering and hence the name would be, 6-bromo-6-ethoxy-7-hydroxy-2-iodo-2,5-dimethylcycloheptanecarbaldehyde.

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