30370
We investigated the ability of 19 recently synthesized arylpiperazine compounds to protect human SH - SY5Y neuroblastoma cells from the neurotoxin 6 - hydroxydopamine ( 6 - OHDA ) .
 Chemical: arylpiperazine; Chemical: 6 - hydroxydopamine; Chemical: 6 - OHDA
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: arylpiperazine; Chemical: 6 - hydroxydopamine; Chemical: 6 - OHDA