27144
In this paper , ultrastable aqueous foam stabilized by a kind of flexible connecting bipolar - headed surfactant alkyl polyoxyethylene sulfate ( AE3S ) with coexisting Mg ( 2 + ) was reported .
 Chemical: alkyl polyoxyethylene sulfate; Chemical: AE3S; Chemical: Mg ( 2 + )
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: alkyl polyoxyethylene sulfate; Chemical: AE3S; Chemical: Mg ( 2 + )