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In these dispersions vincamine is in a disordered crystalline state due to extensive interactions and contacts with PVP - K30 but the main hydrogen bonding motif characterising its packing remains .
 vincamine, PVP - K30, hydrogen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 vincamine, PVP - K30, hydrogen