887
A fingerprint identification based on an integrated application of different analytical techniques ( HPTLC , NMR , HPLC - DAD and LC - ESI - MS ) is here described to distinguish A . uva - ursi from A . pungens .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None