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Chemical investigation of the soft coral Sinularia maxima resulted in the isolation of seven norditerpenoids , including two new compounds , 12 - hydroxy - scabrolide A ( 2 ) and 13 - epi - scabrolide C ( 6 ) .
 norditerpenoids, 12 - hydroxy - scabrolide A, 13 - epi - scabrolide C
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 norditerpenoids, 12 - hydroxy - scabrolide A, 13 - epi - scabrolide C