Indicate the relationship of the following pairs of compounds as unrelated, constitutional isomers, diastereomers, enantiomers, or identical (identical compounds are sometimes referred to as conformational isomers). H. OH H H CI H HO H CH3 H H3C H3C COOH H3C COOH CH3 H H CH3 HO HI H OH OH CH3 H H H OH CH3 HO -H HO H OH HO -H HO H OH