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Our data in toto support the concept of shorter cyclic polyamine disulfides as preferred agents for polycation - mediated controlled condensation and functional delivery of pDNA to lung epithelial cells in vivo .
 Chemical: cyclic polyamine disulfides
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: cyclic polyamine disulfides