11102
Anti - fouling activity of compounds 1 - 3 against Bugula neritina larvae was evaluated , sterol ( 1 ) exhibited significant inhibitory effect with EC ( 50 ) value of 2 . 5 mu g / mL , while having low toxicity with LC ( 50 ) > 25 . 0 mu g / mL .
 sterol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 sterol