This invention provides a
benzothiadiazine 1,1-dioxide compound, its preparation method, and its applications. The general
structural formula of the
benzothiadiazine 1,1-dioxide compound is shown in Formula (I), or its isomers, or pharmaceutically acceptable salts, esters, or prodrugs thereof. The
benzothiadiazine 1,1-dioxide compound of this invention has a novel structure, can selectively inhibit HDAC6
enzyme, has a strong protective effect on
nerve cells,
low toxicity, and low potential
cardiotoxicity, and is expected to be used as a neuroprotective agent for the treatment of neurodegenerative diseases.