Hydroxy Substituent When-OH is part of a higher priority class of compound,it is named as hydroxy. ·Example: OH CH2CHCHCOOH also known as GHB 4-hydroxybutanoic acid Chapter 10 9Chapter 10 9 Hydroxy Substituent • When -OH is part of a higher priority class of compound, it is named as hydroxy. • Example: CH2 CH2 CH2 COOH OH 4-hydroxybutanoic acid also known as GHB =>