2787
Five new highly oxygenated oplopane sesquiterpenes , songaricalarins A - E ( 1 - 5 ) , and two known analogues ( 6 and 7 ) were isolated from the roots and rhizomes of Ligularia songarica .
 Chemical: oxygenated oplopane sesquiterpenes; Chemical: songaricalarins A - E
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: oxygenated oplopane sesquiterpenes; Chemical: songaricalarins A - E