765
The stable inclusion complex of puerarin and 2 - hydroxypropyl - beta - cyclodextrin ( HPCD ) was prepared by a ball mill under the following conditions : equimolar ratio of puerarin to HPCD ; rotational speed of 250 rpm ; milling time of 90 min ; steel balls of 22 mm diameter .
 Chemical: puerarin; Chemical: 2 - hydroxypropyl - beta - cyclodextrin; Chemical: HPCD; Chemical: HPCD
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: puerarin; Chemical: 2 - hydroxypropyl - beta - cyclodextrin; Chemical: HPCD; Chemical: HPCD