3421
The pyridine alkaloid nicotine did not inhibit fetal movement in a day 40 pregnant goat model , suggesting agonist specificity for the inhibition of fetal movement .
 Chemical: pyridine alkaloid; 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: pyridine alkaloid; Chemical: nicotine