23382
The in vivo degradation and elimination after subcutaneous implantation of injectable p ( SA - RA ) 3 : 7 copolymer in rats , followed by characterization of the polymer matrix composition during hydrolysis and erosion , is reported .
 Chemical: p ( SA - RA ) 3 : 7
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: p ( SA - RA ) 3 : 7