4-Chloroindole-3-acetic acid
4-Chloroindole-3-acetic acid (4-Cl-IAA) is a chlorinated analogue of indole-3-acetic acid (IAA) (HY-18569) auxin that functions as a plant hormone, which is found in the seeds of Medicago truncatula、Melilotus indicus and Trifolium[1].