14221
PPT was absorbed into the body quickly , with a Tmax of 0 . 58h and a Cmax of 0 . 13 mu g / ml , while PPD was absorbed relatively slowly with a Tmax of 1 . 82h and a Cmax of 1 . 04 mu g / ml .
 Chemical: PPT; Chemical: PPD
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: PPT; Chemical: PPD