20301
The particles produced from both formulations were amorphous ; however , the formulation containing glycerol generated particles with a porous structure , while the glycerol - free formulation generated particles with a primarily spherical morphology .
 Chemical: glycerol; Chemical: glycerol
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: glycerol; Chemical: glycerol