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We previously reported that joint effects of 3 , 4 - methylenedioxymethamphetamine ( MDMA , ecstasy ) and three other often co - ingested amphetamines ( methamphetamine , 4 - methylthyoamphetamine and D - amphetamine ) could be predicted by the concentration addition ( CA ) model in HepG2 cells .
 Chemical: 3 , 4 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: ecstasy; Chemical: amphetamines; Chemical: methamphetamine; Chemical: 4 - methylthyoamphetamine; Chemical: D - amphetamine
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 - methylenedioxymethamphetamine; Chemical: MDMA; Chemical: ecstasy; Chemical: amphetamines; Chemical: methamphetamine; Chemical: 4 - methylthyoamphetamine; Chemical: D - amphetamine