5377
The proline derivative l - Pro2 reached enhancement ratios of up to 40 at 1 % concentration , which is higher than that of the well - established and standard enhancers Azone , DDAIP , DDAK , and Transkarbam 12 .
 Chemical: proline; Chemical: l - Pro2; Chemical: Azone; Chemical: DDAIP; Chemical: DDAK; Chemical: Transkarbam 12
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: proline; Chemical: l - Pro2; Chemical: Azone; Chemical: DDAIP; Chemical: DDAK; Chemical: Transkarbam 12