Diversely substituted 3-isopropylamino-4 H-1, 2, 4-benzothiadiazine 1, 1-dioxides are known to be potent KATP channel openers, with several drugs being selective for the SUR1/Kir6. 2 channel subtype. This work examined the biological activity, tissue selectivity, and in vitro metabolic stability of hydroxylated analogues of 3- isopropylaminobenzothiadiazine dioxides. Because of the presence of a chiral center, the ...