下列藥物中,何者屬於長效型\mathrm{\beta}_{2} 腎上腺性受體(\mathrm{\beta}_{2} adrenergic receptor)致效劑,常用於治療氣喘及慢性阻塞性肺病(chronic obstructive pulmonary disease)?
\mathrm{\beta}_{2}
Salmeterol
Albuterol
Naphazoline
Dobutamine