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Injectable PLA - based in situ forming implants for controlled release of Ivermectin a BCS Class II drug : solvent selection based on physico - chemical characterization .
 PLA, Ivermectin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 PLA, Ivermectin