10548
Two new ent - 3 , 4 - seco - labdane diterpenoids , methylcallicarpate ( 1 ) and callicarpic acid ( 2 ) , were isolated from the leaves of Callicarpa nudiflora Hook et Arn .
 ent - 3 , 4 - seco - labdane diterpenoids, methylcallicarpate, callicarpic acid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ent - 3 , 4 - seco - labdane diterpenoids, methylcallicarpate, callicarpic acid