Common Names es-ccc8om NH, CH CH3-CH-C-OH CH,一CH2一CH2一C-OH CH,一CH一CH2一C-OH B y B a-chloropropionic acid y-aminobutyric acid isovaleric acid (B-methylbutyric acid) Copyright 2010 Pearson Prentice Hall,Inc. Many aliphatic acids have historical names. Positions of substituents on the chain are labeled with Greek letters starting at the carbon attached to the carboxylic carbon Chapter 20 3Chapter 20 3 Common Names ▪ Many aliphatic acids have historical names. ▪ Positions of substituents on the chain are labeled with Greek letters starting at the carbon attached to the carboxylic carbon