Compounds having the formula ##STR1## and their pharmaceutically acceptable acid addition salts, wherein --X-- is --O--, --CH.sub.2 -- or --; .dbd.Y is .dbd.O or a derivatized keto group which is hydrolyzable or enzymatically convertible to a keto group; R is alkyl having from 1 to 12 carbon atoms or aralkyl having from 7 to 20 carbon atoms; and Ar is the 3-aromatic or heterocyclic residue of a 1-alkylamino-2-propanol having an aromatic or heterocyclic substituent at the 3-position and having .beta.-adrenergic blocking properties; are useful as .beta.-adrenergic blocking agents and are of particular interest in the treatment of glaucoma or for lowering intraocular pressure.
具有以下式子##STR1##及其药学上可接受的酸盐,其中--X--为--O--,--CH.sub.2--或--; .dbd.Y为.dbd.O或可
水解或酶可转化为酮基的衍生酮基; R为具有1至12个碳原子的烷基或具有7至20个碳原子的芳基烷基; Ar为1-烷基
氨基-2-
丙醇的3-芳基或杂环残基,其在3位具有芳香或杂环取代基且具有β-
肾上腺素阻滞作用; 有用作β-
肾上腺素阻滞剂,特别适用于青光眼的治疗或降低眼压。