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Moreover , L alpha phases formed by fluorocarbon chains exhibited higher viscoelasticity than ones formed by the hydrocarbons , and the bilayers formed by branched chains were rather flexible , revealing obvious undulation .
 Chemical: fluorocarbon; Chemical: hydrocarbons
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: fluorocarbon; Chemical: hydrocarbons