20311
A series of PACA - hydrogel hybrid systems with increasing PACA side chain hydrophobicity was prepared using physically crosslinked alginate films and hydrophilic diclofenac sodium as model hydrogel / drug system .
 Chemical: PACA; Chemical: PACA; Chemical: diclofenac sodium
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: PACA; Chemical: PACA; Chemical: diclofenac sodium