2288
The argument is often made that the degradability of such polymers , generally synthesized with either disulfide or hydrolytically degradable crosslinkers , is critical to the high efficiency and low toxicity of the system .
 Chemical: disulfide
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: disulfide 
Answer:
 Chemical: disulfide