1973
The molecular effects of dithiocarbamates on neuronal cell systems are not fully understood , especially in terms of their ability to accumulate copper ions inside the cell .
 Chemical: dithiocarbamates; Chemical: copper
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: dithiocarbamates; Chemical: copper