The invention provides compounds of the general formula (I)
 and physiologically acceptable salts and solvates thereof, wherein
Ar represents the group
 where Q¹ represents a straight or branched C₁₋₃alkylene group,
 where Q² represents a group R³CO-, R³NHCO-, R³R⁴NSO₂- or R⁵SO₂-, where R³ and R⁴ each represent a hydrogen atom or a C₁₋₃alkyl group, and R⁵ represents a C₁₋₃alkyl group,
  R represents a hydrogen atom or a C₁₋₃alkyl group;
R¹ and R² each independently represent a hydrogen atom or a methyl or ethyl group; and
k represents an integer from 1 to 8;
m represents zero or an integer from 2 to 7, and;
n represents an integer from 1 to 7 with the proviso that the sum total of k, m and n is 4 to 12;
X represents an oxygen or sulphur atom, and;
Y and Z each represent a bond, or an oxygen or sulphur atom with the proviso that when Y is a bond m is zero, or when Y represents an oxygen or sulphur atom m is an integer from 2 to 7, or when Y and Z each independently represent an oxygen or sulphur atom then n is an integer from 2 to 7;
Q represents a naphthalenyl group which may optionally be substituted by one or two groups selected from C₁₋₄alkyl, C₁₋₄alkoxy, hydroxy and halogen.
The compounds have a stimulant action at β₂-adrenoreceptors and may be used in the treatment of diseases associated with reversible airways obstruction such as asthma and chronic bronchitis.  
                            本发明提供通式 (I) 的化合物
 及其生理上可接受的盐和溶液,其中
Ar 代表基团
 其中 Q¹ 代表直链或支链 C₁₋₃烷基、
 其中 Q² 代表基团 R³CO-、R³NHCO-、R³R⁴NSO₂- 或 R⁵SO₂-,其中 R³ 和 R⁴ 各自代表氢原子或 C₁₋₃ 烷基,而 R⁵ 代表 C₁₋₃ 烷基、
  R 代表氢原子或 C₁₋₃ 烷基;
R¹ 和 R² 各自独立地代表氢原子或甲基或乙基;以及
k 代表 1 至 8 的整数;
m 代表零或 2 至 7 的整数,以及
n 代表 1 至 7 的整数,但 k、m 和 n 的总和为 4 至 12;
X 代表氧原子或
硫原子,以及
Y 和 Z 各自代表一个键,或一个氧原子或
硫原子,但当 Y 代表一个键时,m 为零,或当 Y 代表一个氧原子或
硫原子时,m 为 2 至 7 的整数,或当 Y 和 Z 各自独立地代表一个氧原子或
硫原子时,n 为 2 至 7 的整数;
Q 代表
萘基,可任选被一个或两个选自 C₁₋₄烷基、C₁₋₄烷氧基、羟基和卤素的基团取代。
这些化合物对 β₂-
肾上腺素受体有刺激作用,可用于治疗与可逆性气道阻塞有关的疾病,如哮喘和慢性支气管炎。