9012
Special attention is paid to the floppy strongly anharmonic degree of freedom of 44BPY , which is related to the most salient structural feature , namely the twist angle theta between the two pyridine rings .
 Chemical: 44BPY; Chemical: pyridine
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: 44BPY; Chemical: pyridine