30026
Structural revision of methyl tortuoate D , a bis - cembranoid from Hainan Sarcophyton tortuosum and its absolute stereochemistry .
 Chemical: methyl tortuoate D; Chemical: bis - cembranoid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: methyl tortuoate D; Chemical: bis - cembranoid