16302
Ginkgolide B consists of three lactone groups , which may undergo hydrolysis , and lead to the rings opening in aqueous solution with different pHs .
 Chemical: Ginkgolide B; Chemical: lactone
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: Ginkgolide B; Chemical: lactone