17031
Pharmacological characteristics required by novel inhaled LABAs include 24 h bronchodilator effect in vivo which would make them suitable for once daily administration ( ultra - LABA ) , high potency and selectivity for beta2 - adrenoceptors , rapid onset of action , low oral bioavailability ( < 5 % ) after inhalation , and high systemic clearance .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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