5868
Formation of M5 - 2 was much faster than that of M2 , and M5 - 2 can undergo beta - oxidation to yield phthalide - 3 - acetic acid in rat liver homogenate .
 Chemical: phthalide - 3 - acetic acid
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: phthalide - 3 - acetic acid