12641
Due to their crystalline nature , the encapsulation of hydrophobic corticosteroids within polymeric nanoparticles by o / w solvent evaporation method is often difficult to achieve .
 Chemical: corticosteroids
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: corticosteroids