22041
At 7 - 21 days , DPHD accelerated osteoblast differentiation , indicated by alkaline phosphatase activity and osteoblast - specific mRNA production .
 Chemical: DPHD
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: DPHD