Hydroxy Substituent When-OH is part of a higher priority class of compound,it is named as hydroxy. carboxylic acid OH CH2CH2CH2COOH 4321 4-hydroxybutanoic acid also known as y-hydroxybutyric acid (GHB) Chapter 10 9 Chapter 10 9 Hydroxy Substituent • When —OH is part of a higher priority class of compound, it is named as hydroxy. 4-hydroxybutanoic acid also known as g-hydroxybutyric acid (GHB) CH2CH2CH2COOH OH carboxylic acid 4 3 2 1