6844
MDMA catechol metabolites were neurotoxic to SH - SY5Y neurons , leading to caspase 3 - independent cell death in a concentration - and time - dependent manner .
 Chemical: MDMA; Chemical: catechol
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: MDMA, catechol 
Answer:
 Chemical: MDMA; Chemical: catechol