26326
Here , we have studied the effects of C4 - C - N - PEG9 on the photorheological behavior of viscoelastic wormlike micelles formed by aqueous mixture of nonionic surfactants , polyoxyethylene phytosterol ether ( PhyEO20 ) and tetraoxyethylene dodecyl ether ( C12EO4 ) .
 Chemical: C4 - C - N - PEG9; Chemical: polyoxyethylene phytosterol ether; Chemical: PhyEO20; Chemical: tetraoxyethylene dodecyl ether; Chemical: C12EO4
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: C4 - C - N - PEG9, polyoxyethylene phytosterol ether, PhyEO20, tetraoxyethylene dodecyl ether, C12EO4 
Answer:
 Chemical: C4 - C - N - PEG9; Chemical: polyoxyethylene phytosterol ether; Chemical: PhyEO20; Chemical: tetraoxyethylene dodecyl ether; Chemical: C12EO4