3789
INTRODUCTION : Tanshinone IIA ( TSIIA ) , cryptotanshinone and tanshinone I are major bioactive constituents of Danshen , a Chinese herbal medicine .
 Tanshinone IIA, TSIIA, cryptotanshinone, tanshinone I
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Tanshinone IIA, TSIIA, cryptotanshinone, tanshinone I