17549
Novel effects of ectoine , a bacteria - derived natural tetrahydropyrimidine , in experimental colitis .
 Chemical: ectoine; Chemical: tetrahydropyrimidine
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: ectoine; Chemical: tetrahydropyrimidine