2291
This investigation describes the impact of Orn enantiomers on the production and distribution of free , conjugated , and bound polyamines , as well as nicotine in tobacco cells .
 Chemical: Orn; Chemical: polyamines; Chemical: nicotine
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: Orn; Chemical: polyamines; Chemical: nicotine