21617
Towards squalamine mimics : synthesis and antibacterial activities of head - to - tail dimeric sterol - polyamine conjugates .
 Chemical: sterol; Chemical: polyamine
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: sterol; Chemical: polyamine