9140
3 , 4 - Methylenedioxy - methamphetamine induces in vivo regional up - regulation of central nicotinic receptors in rats and potentiates the regulatory effects of nicotine on these receptors .
 Chemical: 3 , 4 - Methylenedioxy - methamphetamine; 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: 3 , 4 - Methylenedioxy - methamphetamine; Chemical: nicotine