1-Aminocyclopropane-1-carboxylic acid 1-Aminocyclopropanecarboxylic acid 22059-21-8 4-14-00-00973 (Beilstein Handbook Reference) ACC BRN 2076413 CB 1703 Cyclopropanecarboxylic acid, 1-amino- NSC 98430 alpha-Aminocyclopropane carboxylic acid alpha-Aminocyclopropanecarboxylic acid