9151
Western blots with specific alpha 4 and alpha 7 antibodies showed no significant differences between the groups , indicating that , as reported for nicotine , up - regulation caused by MDMA is due to post - translational events rather than increased receptor synthesis .
 Chemical: nicotine; Chemical: MDMA
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: nicotine; Chemical: MDMA