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The structure - activity relationship suggests that more lipophilic derivatives show more permeation enhancement , TJ disassembly , and less viability in the order of hexyl =~ butyl > propyl > methyl and demonstrates that the permeation effect is not only mediated by permanent positive charge but also through by the extent of N - alkylation .
 Chemical: hexyl; Chemical: butyl; Chemical: propyl; Chemical: methyl; Chemical: N
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: hexyl; Chemical: butyl; Chemical: propyl; Chemical: methyl; Chemical: N