12513
Dehydration of DOPC / DOTAP ( 70 / 30 ) and DOPC / DC - Ch ( 70 / 30 ) was observed in the presence of mRNA but not in the case of zwitterionic DOPC liposomes , indicating that mRNA binds in regions between the phosphate [ - PO ( 2 ) ( - ) - ] and carbonyl [ - C = O - ] moieties of lipids .
 Chemical: DOPC; Chemical: DOTAP; Chemical: DOPC; Chemical: DC - Ch; Chemical: DOPC; Chemical: phosphate; Chemical: PO ( 2 ) ( - ); Chemical: carbonyl; Chemical: C = O
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: DOPC, DOTAP, DOPC, DC - Ch, DOPC, phosphate, PO ( 2 ) ( - ), carbonyl, C = O 
Answer:
 Chemical: DOPC; Chemical: DOTAP; Chemical: DOPC; Chemical: DC - Ch; Chemical: DOPC; Chemical: phosphate; Chemical: PO ( 2 ) ( - ); Chemical: carbonyl; Chemical: C = O