30028
The structure of methyl tortuoate D ( 1a ) , firstly isolated and reported by Li et al . from the title organism , was corrected as 1 by an extensive analysis of its one - dimensional and two - dimensional nuclear magnetic resonance data and by comparison with those reported in the literature .
 Chemical: methyl tortuoate D
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
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Answer:
 Chemical: methyl tortuoate D