Devise an efficient synthesis of the diol shown below starting with 1,1,3,3-tetramethyl-2-ethylcyclohexane. 
Definitions:
Numerical Limit
A specified maximum number or quantity allowed or prescribed by regulations or law.
Ambiguous
Lacking clarity or preciseness in meaning, which can lead to uncertainty or varied interpretations.
Legal Heirs
Individuals who are legally entitled to inherit a deceased person's property under the laws of intestacy if there is no will.
Invalid
Not acceptable according to law or void of legal significance; lacking in correctness or truth.
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