3149
L - Carnitine appears to be a promising agent in preventing or reversing ketamine ' s toxic effects on neurons at an early developmental stage .
 Chemical: L - Carnitine; Chemical: ketamine
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: L - Carnitine; Chemical: ketamine