21654
Three new dolastane diterpenes ( 1 - 3 ) and five previously reported perhydroazulenes were isolated from the organic extracts of the brown alga Dilophus spiralis .
 Chemical: dolastane diterpenes; Chemical: perhydroazulenes
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: dolastane diterpenes; Chemical: perhydroazulenes