3687
Arsenic trioxide - induced hERG K ( + ) channel deficiency can be rescued by matrine and oxymatrine through up - regulating transcription factor Sp1 expression .
 Chemical: Arsenic trioxide; Chemical: K ( + ); Chemical: matrine; Chemical: oxymatrine
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: Arsenic trioxide; Chemical: K ( + ); Chemical: matrine; Chemical: oxymatrine