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On day 2 , heavy users demonstrated elevated levels upon awakening and all ecstasy - polydrug users demonstrated elevated pre - bed levels compared to non - users .
 Chemical: ecstasy
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: ecstasy