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We have investigated the aqueous phase behavior of choline soaps with C ( 8 ) and C ( 10 ) chain - lengths ( choline octanoate and choline decanoate ) and with a C ( 18 ) chain - length with a cis - double bond ( choline oleate ) .
 Chemical: choline; Chemical: C ( 8 ); Chemical: C ( 10 ); Chemical: choline octanoate; Chemical: choline decanoate; Chemical: C ( 18 ); Chemical: choline oleate
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: choline; Chemical: C ( 8 ); Chemical: C ( 10 ); Chemical: choline octanoate; Chemical: choline decanoate; Chemical: C ( 18 ); Chemical: choline oleate