4520
Antidepressant - like effects of fractions , essential oil , carnosol and betulinic acid isolated from Rosmarinus officinalis L .
 carnosol, betulinic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 carnosol, betulinic acid