5406
Its biosynthetic pathway , however , remains largely unknown , with the last unequivocally demonstrated intermediate being ( - ) - matairesinol .
 Chemical: ( - ) - matairesinol
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: ( - ) - matairesinol